Write a confirmation letter responding to Ly

A request letter
Dear Han,
Today, I write this letter to borrow your book about wildlife. Can you help me? I’m coming for the book at 9 a.m this Saturday and will be bring it back to you in the morning on Monday. Is the time convenient for you? Please let me knows as soon as possible.

A confirmation letter
Dear Ly,
I’m so happy when I receive your request letter. I accept your suggestion. And you can borrow my book but at 11 a.m on Saturday because I’m going to visit my grandma at 9a.m.
I’ll be waiting for you at 11 o’ clock on Saturday .
Love,
Han