*** Write an e-mail to your friend to attend marriage ceremony of your elder sister.
Subject: Invitation to attend Marriage Ceremony.
Dear Gazi Sharif,
This is to say thanks for your last E-mail. I am pleased to inform you that the marriage ceremony of elder sister will come off on 13th February. I cordially invite you to attend this happy function and make the programme more enjoyable. My parents will also happy to see you among us. You are request to come at our house at least a day before. Your absence will through cold water into my joy and happiness. Please do not fail to attend. I am looking forward to hearing from you. Have a nice time.