如何写英文的邀请函?要写成作文那种格式的,8句话.比如：There will be a invitation.后面怎么继

Invitation to my birthday party.
My birthday will be on xx August 2011, Saturday.
My parents will hold a party for me at home.
I would like to invite you to attend.
The start time will be 11:00a.m.
There will be games and buffet lunch.
Also there will be magic show .
Please reply to me if you will join.
Yours faithfully.