英文 某人捡到别人的手机,帮忙写一篇英语感谢信.内容：某人捡到手机,别人感谢他.hey,如果你帮我,我会很感谢你.

Dear XX,
I am writting this letter for thanking you .when i lost my mobile phone,I was in hurry,you find it,and return to me,How kind you are!
You can't think how glad when i got it!I really appreciate everything you've done!
Your sincerely
XXX