December 24, 2008
(NAME, COMPANY AND ADDRESS)
It has come to my attention that your order was delivered late because of inevitable circumstances. Please accept my apologies and let me assure you that our company otherwise has a favorable record of delivering by the exact date we specify.
I just hope the delay did not cause you much inconvenience. I really look forward to serving you again. Feel free to call me at (telephone #) if you have any concerns.