1902, X Street, Madison Avenue
Los Angeles, CA-90001
[Subject: Normally bold, summarizes the intention of the letter] -Optional-
Dear Rony Conrad,
Thank you for getting in touch with us. We regret to hear that you are not very happy with your new sound system. In order to determine how we can fix the problem, we will be sending one of our trained specialists over tomorrow, before lunchtime, to make an inspection. Please have the sales receipt ready, together with the other paperwork, so that we can process your request more efficiently. Thank you very much!