123, X Street, Y Avenue
[Subject: Normally bold, summarizes the intention of the letter] -Optional-
Dear Austin Parker,
Many thanks for sending us the free tickets to your production. It was a great night and the whole show was superb. It has been many years since we have the opportunity to visit the York Theater, and it was a great treat for us both. We were amazed at what a wonderful refit had been done on the old theater, and the new show was perfect for the new setting.
We thank you again for a wonderful performance and a memorable night for us both.