[DATE, ex. Wednesday, June 11, 1998]
[NAME, COMPANY AND ADDRESS, ex.
1234 First Street
Anycity, Anystate 85245]
Dear [NAME, ex. John Smith],
Regrettably, I must request that our order [ORDER OR ORDER NUMBER, ex. for 50 8×5 sheets of drywall] be cancelled immediately. [BRIEFLY STATE REASON, ex. As you know, the recent trim-carpenter strike has delayed construction and we will not require the drywall until the matter is resolved.]
Please accept my apologies for any inconvenience this may have caused you.
[YOUR NAME, ex. Jill Jones]