Imagine, you are Salam/Salma. Robin/Runa is your best friend. You are going for a picnic. Now, write an email to your friend inviting him/her to join the picnic with you using his/her email address.

To: robin07@gmail.com
Subject: To join a picnic
Dear Robin,

I received your letter yesterday, I have known that your Annual Examination has ended. Our Test Examination also ended. Some of my classmates have decided to go on a picnic at Rangamati on Friday next. Our Bengali teacher Prof. Kalam Mahmud will also accompany us. On Friday at 7 O'clock in the morning, we shall start for Rangamati from our college by a mini bus. We shall take all necessary food stuff, utensils (সাজ সরঞ্জাম) and musical instruments with us. We shall spend (অতিবাহিত করা) the whole day at the site of the picnic and enjoy ourselves freely. After sun-set we shall come back to Chattogram by the same bus. We shall be very glad if you accompany' (সঙ্গ দেওয়া) us.. I am sure, you will have a nice time with us. Do come to our college early in the morning on Friday. Please bring you camera with you.

I am quite O.K. Give my regards to your parents.
With love and best wishes.
Your loving friend
Salam