1234, West 67 Street
Carlisle, MA 01741
[Subject: Normally bold, summarizes the intention of the letter] -Optional-
Dear Richard Anderson,
My secretary called you two weeks ago to book the function room at your restaurant for our business review on April 16. Unfortunately, since we recently had a reorganization, we need to cancel our reservation and respectfully request for a reimbursement of our deposit. We deeply apologize for any inconvenience on your part. When everything is already settled, we hope to transact with you again.