Dear___________,

　　I am writing to formally request to___________(请求的内容)

　  The reason for_____is that______(给出原因).I_____, so I_____(给出细节)I would also like to request______(提出进一步的要求). I am sorry for any inconvenience I have caused.

　　Thank you for your attention to these requests. If you have any questions, do not hesitate to contact me at _______(电话号码).I look forward to a favorable reply.

　　Yours sincerely

　　Li Ming