英语介绍信（精选31篇）
Dear sir or madam
i am writing this letter to recommend myself as a qualified candidate for the position advertised on the newspaper—part-time english reporter.
i am a student from xinhua middle school, aged 17.i think im qualified for the job .first of all, as a student, ive read a lot and have much knowledge in many fields. im enthusiastic about english and do well not only in speaking but also in writing. besides, im easy to get along with an enjoy working together with others. last but not least, i once worked as a reporter for my school broadcasting station. so im sure i can do the job well if i get the position.
i would appreciate it if you could allow me an interview.im looking forward to your reply.
chinese is one of the worlds major language. it is spoken by the largest number of people in the world, more than 1 billion, most of whom live in china. there are about 50,000 characters in written chinese, about 20,000 of which are known to most people. there are 8 main varieties of chinese, which are different from each other in pronunciation. putonghua, closely similar.
sincerely yours
professor
Dear sir or madame,
it is with great pleasure that i write to recommend courtney alexander to you. i have known courtney for the pst two years and have had the pleasure of having her in my united states history class during her junior. in the class she ws one of the most outstanding students. at the semester final she earned high grade of 91, which should be "a" according to our grading system. i also found her good at other studies. after classes, she had personal talks with me many times. she indicated a great interest in teching. during tht time i found her to be a bright, diligent, friendly youn woman. besides, courtney is not afraid of hard work, and is a team plyer. her ability to work with her clssmates is a special quality that will benefit her as she moves on to the next level. throughout the year, she worked cooperatively with those seated around her in reviewing notes, going over possible examination materials, and working through some of the more difficult concepts.through her contributions to my class, the promissing young girl helped not only herself, but also others around her who were not progressing and improving as quickly as she could. courtney alexander is undoubtedly a student with the potential for great success at the next level. in my opinion, courtney alexander was born a teacher, which can be further developed and she is sure to give all of you a big surprise in the years to come. so i enthusistically recommend her for admission to your university.
if you have any questions or concerns in regards to courtney, plese feel free to contact me at . thank you for your time.
Dear h.r. manager:
hello. the bank has been a good image in the social reputation, i am about to graduate, if there is a chance is willing to your company can effect a modest! my name is , graduated from the china university of mining and technology, was studying financial management specialty. the following is my personal letter of introduction.
i to your bank for some basic understanding. as a newcomer students finish their studies, i have the confidence to accept the social test and the challenge from its own. during my college study hard, strict demands on themselves, respect for teachers, and actively participate in various activities organized by the school. on weekdays, and teachers and students live together in peace together. in english, passed band four six examination. i know, the bank clerk is the need to have a strong sense of responsibility, practice. therefore, in school period, i tried a different practice and work. i do secretary, did the promotion, has made the family, worked as a waitress, different occupation has given me a different experience let me gradually from a silly little girl into an independent thinking, problem solving skill and teamwork spirit. in order to remain invincible in the work, do a better job.
i hope to go to your bank to work, to learn the theory of combination of knowledge and practice, so that their life can have a qualitative leap. i believe that your bank is whole image, management mode, working atmosphere will be more attractive to me in my mind, is the pursuit of the ideals and goals.
we enclosed a copy of my resume, hope to be able to notice will have the opportunity to meet.
sincerely yours
professor
Dear Sir or Madame,
I'm very glad to join in the interviw.First,let me introduce myself to you.My name is Lin YA Qian,I'm 20 years old,I come from Zhe Jiang,and I'm an outgoing girl,I like philosophy and sport.Oh yes,I hope that I can do something for the Beijing Olympics.If you give me the great chance,I won't let you disappoint.Ok,that's all.I hope that you are satisfied with me,thank you!
respectfully yours,
Dear mr./ms，
we are pleased to introduce mr. wang，our import manager of textiles department. mr. wang is spending three weeks in your city to develop our business with chief manufactures and to make purchases of decorative fabrics for the coming season.
we shall be most grateful if you will introduce him to reliable manufacturers and give him any help or advice he may need.
Yours faithfully，
Alison
Dear Madama/Sir：
When Miss requested a letter of reference from me to support her application for graduate studies at your esteemed university, as her teacher, I am pleased to write this letter for her.
I got to know when she took part in National School of Mathematical Modeling Contest in 20xx. Exactly, the time was one hour before the contest be over. At that time other groups already handed over the paper and program to person in charge and only her group around the computer amended something, I came to remind them of hurrying up and found that they were amending the map which I felt very good and also accorded with the paper requirement. When I asked her what she did, she said that she put several cities on the wrong places so she must correct them. She checked it again and again, before ten minutes the contest would be over and her group handed over the map. I was impressed by her clinging spirit which made her group win the second prize in the mathematical modeling contest.
The second time of meeting her was that I reviewed practices things in her class. When I saw her, she only one stayed in the class to consult materials, I asked her why other students couldn’t stay with her, she said that other students were cold and she let them go to back to have a rest. She already found out a new arithmetic but didn’t use it masterly, so she used three computers to check the results by changing parameters. The quantities of data were so large that I couldn’t believe she was able to finish the task, while I was surprised by her confidence and ability, she finished them on time. I was impressed by her spirit on academy again.
At her junior year, I taught her mathematic modeling course, she treated it very earnestly and she always finished each practical subject perfectly. Such as, after I gave her some key guidance, she classified the knowledge needed for study and listed the best methods to acquire knowledge on this field and finished it efficiently.
Recently I got to know she will apply for financing engineering and I was glad to tell her that if she connects theory with practice, she will exert mathematical character better. I strongly support her decision and hope my recommendation will receive your favorable consideration.
Sincerly yours
Professoer
Room 212 Building 343
Tsinghua University,Beijing 100084
Ms. Yang:
I was referred to you by Mr. Zhang, a Partner with your Beijing office, who informed me that the Shanghai office of your company is actively seeking to hire quality individuals for your Auditor Program.
I have more than two years of accounting experience, including interning as an Auditor last year with the Beijing office of CCCC. I will be receiving my MBA this May from Tsinghua University. I am confident that my combination of practical work experience and solid educational experience has prepared me for making an immediate contribution to your company. I understand the level of professionalism and communication required for long-term success in the field. My background and professional approach to business will provide your office with a highly productive Auditor upon completion of your development program.
I will be in the Shanghai area the week of April 16. Please call me at 1 to arrange a convenient time when we may meet to further discuss my background in relation to your needs. I look forward to meeting you then.
Sincerely,
Cheng Dan
Dear h.r. manager:
My name is li hua.i was born in dalian，liaoning province in february 1977.i started school in 1984 when i was seven，and i studied in guangming primary school from 1984 to 1990. after that i went to no.6 middle school of dalian and graduated this summer.the main subjects ! studied at school included chinese，maths，english，physics，chemistry and computer.i like english and computer best and i am very good at them.last year i won first prize in the school computer competition.in my spare time i enjoy listening to popular music and collecting stamps.my favourite sports are swimming in summer and skating in winter.
sincerely yours
professor
My name is Li . I was born in Beijing in and now I was years old. There are five people in my family now: my grandparents my father, my mother, and I. I love the members of my family very much. I was the only child. And when I was small I usually play with my friends in the park.
I am a very easy-going man. So, I have a lot of friends. I love English, because its one of the most famous languages in the world. In the future, I have a good dream, my dreams are going to America for further education and devoting myself to communication. So, in order to make the dream come true, Ill try my best! I believe through my hard working, I am sure the God will provide better chances for me to build up my future career and personal characters.
Thats all, thanks.
Dear h.r. manager:
Good morning !
Pesonel statement(introduction) good morning,my dear teachers,my dear professors.i am very glad to be here for your interview.my name is song yonghao,i am 22 years old .i come from luoyang,a very beautiful aicent city.my undergratuade period will be accomplished in changan university in july ,20xx;and now,i am trying my best for obtaining a key to tongji university. generally speaking ,i am a hard working student especially do the thing i am interested in. i will try my best to finish it no matter how difficult it is. when i was sophomore, i found web design very interesting, so i learned it very hard . to weaver a homepage for myself, i stayed with my pesonel computer for half a month.,and i am the first one in my class who own his homepage. forthermore,i am a person with great perserverence. during the days preparing for the first examination,i insist on running every day, no matter what the weather was like.and just owning to this,i could concentrate on my study and succeeded in the end. well ,in my spare time ,i like basketball, tennis and chinese chess. also english is my favorate.i often go to english corner to practise my oral english on every thursday,and write compositions to improve my witten ability .but i know my english is not good enough ,i will continue studying. ok, that is all,thank you for your attention.
sincerely yours
professor
Dear h.r. manager:
this is ,and i want to apply for a foreign trader position in your company.
i will graduate from east china jiaotong university with a bachelor degree in mechanics and electronics engineering this july.
in college we have sourses related to manufacturing ,mechanics&machinery ,electrics&electronics.besides major study, i am aslo interested in international trade.under the influence of my father who is a businessman i want to be a trader ,especial an international trader in mechantronic or electronic field,because in that way it would be a perfect combintion of my interests and profeesional knowledge.i have self-taught some economic courses during the college for the preparation of my career,such as finance,international trade.
international trade is a job always under pressure and with little spare time,and i like this kind of job,bucause working under pressure would bring the whole potential out of us and it's growth for us.international trade is aslo a challenge job,it involves many kinds of knowledge,not only you must know clearly the procedures of international trade ,but aslo the knowledge of the product you are trading.i don't fear of challenge,i only fear no challenge to challenge.
i am a smart guy good at learning,especial those things i like,not only i learn from books, i aslo learn from the people around me,that's why i like to make friends with all kinds of people.i am aslo like reading and watching movies,i read newspaper and magazine regually.i like travelling too and i went to a new place very year during the college.with the characteriscs of honesty,optimisitc,positive,hard-work,promise-keeper,open-mind,i believe i am qualified for the position.
the following is my text format resume in chinese and english, and the attachment is my recent picture and photos of my academic tran and some english test certificates,please download and check them.
please feel free to contact me if you can arrange an interview for me, i can go to for the interview anytime.
best regards
sincerely yours
professor
My name is . i am graduatefrom seniorhigh school and major in . there are people in my family. my father works in a computer company. and my mother is a housewife. i am the youngest one in my family.
in my spare time, i like to read novels. i think reading could enlargemy knowledge. as for novels, i could imagine whatever i like such as a well-known scientist or a kung-fu master. in addition to reading, i also like to play pc games. a lot of grownups think playing pc games hinders the students from learning. but i think pc games could motivate me to learn something such as english or japanese.my favorite course is english because i think it is interesting to say one thing via different sounds. i wish my english could be improved in the next four years and be able to speak fluent english in the future.
sincerely yours
professor
Dear Sir/madam:
As a teacher at school, I am writing to provide you a recommendation for miss/mr. so as to help you assess her/his application for acceptance into your program and consideration for financial aid.
Considered a promising student with originality and sophistication in her/his thinking, (she/he was asked, in the spring semester of 20xx, to develop a subsystem of a DBmS project for her B.S.thesis, for which I was the chief leader. T
his subsystem was designed to manage the information of materials in nO.1 Foundry Plant of Dongfeng Auto Works.To do the job, she/he read many books about software engineering and took some courses in Database Principles and management. Keenly aware that the design of a DBmS decides the quality of the whole software system, she did her/his utmost from the beginning of the project.)(参加过什么活动). From analyzing user’s requirements to designing the whole system, from the detailed designing to the final programming, she was very level-headed and full of innovation every step of the way. Taking full advantage of her ability and creativity, she firmly focused herself on her objective and gnored all distractions. She successfully reached her goal. In the final software testing, only a few bugs were found in her subsystem. my appreciation of her talelent was thus confirmed.miss is a very personable woman, friendly and helpful, and she has always been a team player in her work.
I would greatly appreciate it if you could give her application for candidacy to your Ph.D. program favorable consideration. Should you need any further information in your deliberation, please do not hesitate to contact me.
Sincerely
Dear Mr. / Ms.,
This is to introduce Mr. Frank Jones, our new marketing specialist who will be in London from April 5 to mid April on business.
We shall appreciate any help you can give Mr. Jones and will always be happy to reciprocate.
Yours faithfully,
Yang Ning
尊敬的先生/女士，
现向您推荐我们的市场专家弗兰克?琼斯先生。他将因公务在四月五日到四月中旬期间在伦敦停留。
我们将非常感谢您向琼斯先生提供的任何帮助，并非常愿意回报您的帮助。
您诚挚的
杨宁
Dear Professor Benson,
It gives me great pleasure to introduce you Mr. Wang Can, my classmate and best friend.
He is going to pursue his studies as a postgraduate in your university after his graduation here. We have lived and studied together for almost four years. His performance in the school years was outstanding. In addition, he has a very attractive personality and staying with him is always pleasant.
Considering he is an entire stranger there, would you please give him some guidance regarding the postgraduate entrance examination? If it is convenient, could you introduce him to the future tutor? Any assistance you may render to him will be highly appreciated.
Yours sincerely,
Li Ming
Dear h.r. manager:
Good morning/afternoon, my name is ,you can call me yanzi. i like the feeling flying in the sky like a swallow.
it is really a great honor to have this opportunity for an interview, i would like to answer whatever you may raise, and i hope i can make a good performance today.
now i will introduce myself briefly. i am 20 years old, born in shandong province.i grow up in a sweet family,composed of my dad,mom,brother and myself. i am an optimistic and confident girl. i have full confidence in a bright future,and i believe i can do well in punctuality and diligence are crucial to most future careers,i will try my best. altough i just graduated from school, i have confidence to venture my funture.
scoaring in the sky as an airhostess has been a dream for me since childhood, this is why i'm longing for a job on a plane, and this is why i'm standing here for this interview. i hope my application will be granted ,so that i will delive my best servies throughout the world as a airhostess member of c and my dream can come ture.
that's all. nice talking to you .thanks.
sincerely yours
professor
dear sir / madam,
my name is wang ying, i am xi an university graduates. i am of the department of education of english majors. i am very glad to have this opportunity to improve our mutual understanding.
with the increasingly fierce social competition, the personnel requirements are increasingly high, i try to learn all kinds of knowledge in the university for four years, and the measure of my own.
teacher is hard work and i myself; i have mastered english listening, speaking, reading and writing skills.
in order to better adapt to society after graduation, i learned the computer technology during the summer, and as a english tutor work, counseling a high school student is foreign language courses, was highly praised by parents in the education practice, improve their ability to work. because as in a number of candidates, i may not be the best, but i am still very confident, i will do my best to become an excellent primary and secondary school teachers, sincerely hope that i can make i can in the future in the school a hard gardener.
finally, wide na xiancai wish expensive unit.
sincere candidates,
wang ying
Dear Mr. / ms：
We now recommend our marketing specialist， Mr. Frank will stay in London from April 15 to mid April on would appreciate any help you have provided Mr. Jones and would be very happy to pay you back.
Your sincere friend.
一、我的学习
将摄取科学文化放在最重要的地位。我热爱学习，凡是有用的我都乐意学。大学三年我将兴趣作为学习的催化剂，在掌握全面专业知识的同时，主动学习计算机知识，并达到了熟练操作的程度。为适应日益开放的市场经济，经常阅读经济类报刊杂志。最重要的是，我培养了良好的学习习惯，学会了在任何时候任何情况下学习。
二、我的特长
我的特长是电脑操作和网页设计，至今有两个个人主页。同时我还爱好篮球足球。在公司里，将特长与专业技能相结合，必定能发挥更大的作用。
三、我的人生信条
言必信，行必果。
四、我的爱好
爱好学习，电脑，上网，篮球等。
五、我的突出优点
责任心强，善始善终。办事认真，肯吃苦。有很强的可塑性和再学习能力。善于总结、反省。
六、我当前的缺点
办事不够大胆。自制力不够强。缺乏领导风范。
七、我的目标
我的目标暂时不是立足于那些什么经理职位，我希望在我参加工作以后，稳扎稳打，尽快成长为业务素质过硬的专门人才，在岗位上具有不可替代的作用。从校园走向社会是一个巨大的转变，我已经做好了迎接任何挑战的准备，迎难而进，争取质的进展。并恳切希望能和贵公司一道搏击于21世纪的经济浪潮中，同进同退。
Dear Mrs. Miller，
I’m writing to introduce to you Mr. Wang， one of my high school classmates in Beijing. He is presently working for Lenovo Technologies and is going to be transferred to its branch in your city next month.
Since this will be the first time for him to work in a foreign country， he will possibly be faced with many problems， and especially the housing problem.
He hopes to obtain your guidance and help in finding a good apartment to live. You’ve been living there for more than 10 years， so you are surely familiar with things there.
If you can kindly help find rental quarters for her， I’ll be very ks for your due attention to this letter and hope to receive your reply soon.
Many thanks to the trouble you will have to take for Mr. Johnson.
Yours sincerely，
Dear Sir or Madame,
Good morning, my name is lxg, it is really a great honor to have this opportunity for a interview, i would like to answer whatever you may raise, and i hope i can make a good performance today. i'm confident that i can succeed.
now i will introduce myself briefly, i am 2years old, born in shandong province ,east of china, and i am curruently a senior student at upc of information and engineering control. my major is information and signal processing, and i will receive my master degree after my graduation in june. in the past 3 years,i spend most of my time on study and research, ihave passed cet6 and i have acquired basic knowledge both in theory and in practice.
through college life,i learn how to balance between study and entertainment. by the way,i has acted as class mission secretary for two years and given the title of an excellent class leader. i had a few glorious memory on stage.that is my pride.
sometimes i prefer to stay alone, reading, listening to classic music, but i am not lonely, i like to chat with my classmates, almost talk everything ,i have lots of interest, such as films,travels,handwriting ,sports and so on. my favorite pastime is playing basketball, also, i like blogging on the internet. if you are interested in my blog, you can visit my websitet will be my honor.
i think i'm a good team player and i'm a person of great honesty to others. also i am able to work under great pressure. that's all. thank you for giving me the chance.
Dear Sir or Madame,
I'm very glad to join in the interviw.First,let me introduce myself to you.My name is Lin YA Qian,I'm 20 years old,I come from Zhe Jiang,and I'm an outgoing girl,I like philosophy and sport.Oh yes,I hope that I can do something for the Beijing Olympics.If you give me the great chance,I won't let you disappoint.Ok,that's all.I hope that you are satisfied with me,thank you!
Dear ,
Good morning, my name is jack, it is really a great honor to have this opportunity for a interview, i would like to answer whatever you may raise, and i hope i can make a good performance today, eventually enroll in this prestigious university in september. now i will introduce myself briefly,i am 21 years old,born in heilongjiang province ,northeast of china,and i am curruently a senior student at beijing uni.my major is packaging engineering.and i will receive my bachelor degree after my graduation in june.in the past 4 years,i spend most of my time on study,i have passed CET4/6 with a ease. and i have acquired basic knowledge of packaging and publishing both in theory and in practice. besides, i have attend several packaging exhibition hold in Beijing, this is our advantage study here, i have taken a tour to some big factory and company. through these i have a deeply understanding of domestic packaging industry. compared to developed countries such as us, unfortunately, although we have made extraordinary progress since 1978,our packaging industry are still underdeveloped, mess, unstable, the situation of employees in this field are awkard. but i have full confidence in a bright future if only our economy can keep the growth pace still. i guess you maybe interested in the reason itch to law, and what is my plan during graduate study life, i would like to tell you that pursue law is one of my lifelong goal,i like my major packaging and i won t give up,if i can pursue my master degree here i will combine law with my former education. i will work hard in thesefields ,patent ,trademark, copyright, on the base of my years study in department of p p, my character? i cannot describe it well, but i know i am optimistic and confident. sometimes i prefer to stay alone, reading, listening to music, but i am not lonely, i like to chat with my classmates, almost talk everything ,my favorite pastime is valleyball,playing cards or surf online. through college life,i learn how to balance between study and entertainment. by the way, i was a actor of our amazing drama club. i had a few glorious memory on stage. that is my pride.
Yours sincerely，
Zhang Hua
Dear mr./ms，
we are pleased to introduce mr. wang ， our import manager of textiles department. mr. wang is spending three weeks in your city to develop our business with chief manufactures and to make purchases of decorative fabrics for the coming season.
we shall be most grateful if you will introduce him to reliable manufacturers and give him any help or advice he may need.
yours faithfully，
A formal letter of introduction to whom it may concern,
This is to introduce to you mr. gao, the bearer of this letter, who is the head of the overseas inspection group sent by qinghua uni 。 versity. we should be highly gratified if you would be kind enough to provide them with guidance and conveniences when they visit your company.
respectfully yours,
zhao,
director of guangmin co.ltd
Dear Mr. / Ms.,
This is to introduce Mr. Frank Jones, our ne April 5 to mid April on business.
We shall appreciate any help you can give Mr. Jones and ing season.
We shall be most grateful if you will introduce him to reliable manufacturers and give him any help or advice he may need.
Yours faithfully
Dear Sir or Madame,
my name is ________. i am graduatefrom ________ seniorhigh school and major in ________. there are ________ people in my family. my father works in a computer company. and my mother is a housewife. i am the youngest one in my family.
in my spare time, i like to read novels. i think reading could enlargemy knowledge. as for novels, i could imagine whatever i like such as a well-known scientist or a kung-fu master. in addition to reading, i also like to play pc games. a lot of grownups think playing pc games hinders the students from learning. but i think pc games could motivate me to learn something such as english or japanese.my favorite course is english because i think it is interesting to say one thing via different sounds. i wish my english could be improved in the next four years and be able to speak fluent english in the future.
Dear Sir:
Your advertisement for a Network Maintenance Engineer in the April 10 Student Daily interested me bacause the position that you described sounds exactly like the kind of job I am seeking.
According to the advertisement ,your position requires top university,Bachelor or above in Computer Science or equivalent field and proficient in Windows NT4.0 and LINUX System. I feel that I am competent to meet the requirements. I will be graduating from Graduate School of Tsinghua University this year with a M.S. degree . My studies have included courses in computer control and management and I designed a control simulation system developed with Microsoft Visual InterDev and SQL Server.
During my education, I have grasped the principals of my major and skills of practice. Not only have I passed CET-6, but more important I can communicate with others freely in English. My ability to write and speak English is out of question.
I would appreciate your time in reviewing my enclosed resume and if there is any additional information you require, please contact me.I would welcome an opportunity to meet with you for a personal interview.
With many thanks,
To Whom It May Concern:
I have had the distinct pleasure of having as a student in my debate classes and on my debate team for three years at Eastern Little Hope High School.
has been more than the ideal student. In order to achieve the highest grades and my deepest respect, she has demonstrated outstanding leadership and maintained a clear sense of purpose.
The academics at Eastern Little Hope are most challenging, and fulfilled all the requirements with the added challenge of honors and advanced courses. is an outstanding extemporaneous speaker and debater. She has won many awards on the speech and debate circuits, and qualified for national tournaments. Success in these interscholastic activities requires extensive research and persuasive skills. also holds the degree of Special Distinction, as a member of the National Forensic League.
Due to its nature of metro, state, and national interscholastic competition, the successful high school forensics student serves by not only representing his or her school but also by representing his or her community as well. One of the requirements in my advanced class is to prepare lectures and guidance for the beginners. With ’ s superior knowledge and involvement in the political sciences, she developed a strong sense of confidence with a charming attitude. Therefore, I could always depend on her to set the best example as an instructor. Because of her natural leadership abilities, was selected as our Debate Captain. On account of her mature approach to her responsibilities, I often thought of as a colleague.
Since her classmates, my fellow teachers, and I will always hold her in the highest esteem, I sincerely recommend Stone as the ideal candidate for matriculation at Eastern Little Hope State.
Respectfully submitted,
Alison
Hello!
I ’m ,I feel I will be fit for the job needed in your company. I’m 22 years old and in good health.
After graduation from a middle school, I have studied IT for many years. I am a better well in personal responsibility ,I am good at both operating a PC,I like palying uter and listening to the music.
I’m interested in the position . I want very much to be accepted by your company. I’ll work hard if I can be a member in your company.
Thank you.
Dear sir,
if an ability to learn fast and to work efficiently is important to you, then i may be the right one for the position you offered .please consider my application for the position.
i am supposed to graduate from bussniess school of hubei uniersity of tcchnology in international economy and trade in july 20xx. the three -year education endowed me with a general knowledge and good command of professional knowledge，as well as basic computer knowledge. i have passed all the courses and achieved excellent grade. outside classroom, i was very active and took part in different extracurricular activities. i have been doing many part-time jobs such as sales and others that you can see in my resume. all these experiences contributed much to the development and promotion of my organization and communication ability.
i am a woman who has a strong and creative mind, plus flexibility of cooperation, public relations skills and so on. i would bring a delighted new interest and enthusiasm, and that, of course, would mean more efficient and better work for you. have you an opening for a young woman who believes that she has something to offer? if you wish to see me, i will be very pleased to come in for an interview. i should esteem it a great favor if you could give me an opportunity to try to serve you in the position.
thank you for your consideration.
sincerely yours
professor
yours sincerely