write an email to your friend requesting him or her to come and join you on your birthday.
From: shimonti@gmail.com
Date: 8th October, 2013
Subject: Invitation for Birthday Party
Dear Soumya,
Hope you are doing fine. I am celebrating my 13th birthday on 10th October, 2013 and would like to invite you at my house for the same. Most of our common friends will be coming to the party and I am sure we all will have a great time. I have planned lots of interesting games for the party, and I assure that we will have loads of fun.
I am really anxious to have you in the celebration and look forward to a positive reply.
Bye!
Shimonti