WRITE AN E. MAIL TO YOUR FRIEND THAT YOU CANNOT COME TO HER HOUSE ALTHOUGH YOU HAVE PROMISED HER

From: abc@kmail.com
 To: pqr@geezone.com
 Date: 7 July 20xx
 Subject: Regrets

 Dear PQR,

 I hope you are doing well.

 I did promise to visit you on coming Sunday, but I regret to inform you that I have an Olympiad exam on that day. I am extremely sorry that I will not be able to make it to your house on tat day. I hope to visit you soon and then we can both play your new X-box games and enjoy. 

 Give my regards to your parents.

 Yours lovingly,
 ABC