Write an e-mail to your friend regretting your inability to keep an appointment with him.
Date: 22nd November 20××
From: arjun@yahoo.com
To: manoj@gmail.com
Sub: Inability to keep appointment
Dear Manoj
I hope you are well. Sorry I could not come to see the movie and kept you waiting. Actually my younger brother met with an accident. I was with him in a hospital. We will see a movie together on some other day. Hope you understand. See you tomorrow.
Yours
Arjun