[DATE, ex. Monday, March 31, 2008]

[NAME, COMPANY AND ADDRESS, ex.
Link Building
XYZ Inc.
1234 First Street
Suite 567
Anycity, Anystate  85245]

Dear [NAME, ex. Link Building],

Regrettably, I must request that our order [ORDER OR ORDER NUMBER, ex. for 50 8x5 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.

Sincerely,

[YOUR NAME, ex. Jill Jones]