Writing prompt: Please Find My Dictionary

Student essay:
Dear Mr. Brown,
Thank you for helping me when I lived in your home during America.I felt fantastic and learned a lot from you and America education.Because of your help,I adapted more quickly in both family and school.But now,I have some trouble in lefting a dictionary in your home.This is my first dictionary which my American English teacher sent to me.It is valued for me.I think it maybe on the bookshelf in the bedroom.Please find it patiently and if you find it you can post it to me.After that,I will pay for the postage.Thank you!
Yours,Li Hua

Corrected essay:
Dear Mr. Brown,
Thank you for helping me when I lived in your home during my stay in America. I felt fantastic and learned a lot from you and American education. Because of your help, I adapted more quickly to both family and school. But now, I have some trouble as I left a dictionary in your home. This is my first dictionary which my American English teacher sent to me. It is valuable for me. I think it may be on the bookshelf in the bedroom. Please find it patiently and if you find it you can post it to me. After that, I will pay for the postage. Thank you!
Yours,
Li Hua