To Mr. ______________
We are sorry to learn that the other day you returned from our show-room quite annoyed at the behavior of the sales assistant.
We wish you had brought this to our notice immediately. That would have made things easer for us to put to the wrong done without any loss of time.
While we regret the inconvenience caused to you, we shall request you quite earnestly to give us another chance to serve you. We assure you of the best of our courtesy, and we are sure you will change your impression about us very soon.
Assuring you of the best of our attention.