Andrew Hall
456, X Street, Y Avenue,
Philadelphia, PA-19103
(123) 456-7890
[Subject: Normally bold, summarizes the intention of the letter] -Optional-
Dear Andrew Hall,
Because of interfering work times I shall not be attending the meet about safety scheduled for Saturday. Although I wanted to, but then I cannot be at two places, Summerfield, and Cranfield at the same moment. Please note carefully all the points. I will like to see them and review all of it, may be over dinner on Monday.
Sincerely,
Graham