Please correct

[blueangel]

Dear Dr. Alavi,

I'm really sorry for not submitting a hard copy of my work. In fact, I sent it to one of my friends to give it to you but you weren't in your office on Tuesday and Wendnesday.
Now, I'de be thankful if you do me a favor and give your precious comments on chapter four of my thesis. I promise you will recieve its hard copy on Saturday.
Best wishes,

[Jerezgirl]

Dear Dr. Alavi,

I'm really sorry for not submitting a hard copy of my work. In fact, I sent it to one of my friends to give it to you but you weren't in your office on Tuesday and Wendnesday.
Now, I'de be thankful if you do me a favor and give your precious comments on chapter four of my thesis. I promise you will recieve its hard copy on Saturday.
Best wishes,

(assuming the letter is semi formal)

Dear Dr. Alavi

I apologise for not submitting a hard copy of my work. I had in fact sent it to one of my friends to give to you, but you weren´t in your office on Tuesday and Wednesday.

I´d be grateful if you could find the time to look at chapter four of my thesis and I look forward to receiving your comments. I assure you that you will receive the hard copy on Saturday.

Regards/Best wishes.