Write a confirmation letter

• A request letter

Dear Qui,
I'm going to have a birthday party at 8:00 p.m on Saturday. If you have free time, can you buy me two bunches of bananas, three kilos of oranges, ten mangoes, and bring them to my house an hour before the party?
Please let me know as soon as possible.
Yours,
Ninh

• A confirmation letter

Dear Ninh,
I have receive and found your letter. I'm glad to hear that you going to have a birthday party with your friends.
Certainly, I will help you to buy two bunches of bananas, three kilos of oranges, ten mangoes for the birthday party.
Fortunately, that day is my free day. I'm not busy with anything.
I'll be bring them to your house an hour before the party.
Love,
Qui