how to write a thank you letter

Recipient's name(if it is known) (日期放在右上角)
Title(Manager)
Department name
Company name
Address

Dear Sir/Madam,

Thank you for helping me(置中)

(格兩個格 ) I am (your name), a passenger. I would like to thank you (陳大文) for helping me on 9/2/07 at Tsui Sha Tsui MTR station. He tried his best to help me when I felt dizzy.
(開新段)I will appreciate if you praise Mr.Chan. Thank you for all of you.


Yours faithfully(右)
(Sing your name)(右)
(Your name)(右)

注意:
lee 封信係比地鐵公司(經理)睇既,而唔係比陳大文睇既!

you can write down your that day what thing to do , and why did you thank mtr ,fisinh you can take to mtr 站, and you can write down to www.mtr.com.hk