Suppose, you are Shila. Write an e-mail to invite your friend Minu to attend your sister's birthday party.

To: minu@gmail.com
Subject: Invitation to join my sister's birthday
Hi Minu,
Your email is always a great pleasure for me.
You'll be happy to know that next Thursday we're going to arrange a birthday party of my younger sister. Though it will not be a big celebration, I would like to get you here. My parents also want you to be here with us on that day. Hope you'll not miss it. Accept my invitation!
I'm waiting for your reply. See you soon.
Lovingly yours,
Shila