1234 Archer Road
Gainesville, Fl 32607
[Subject: Normally bold, summarizes the intention of the letter] -Optional-
Dear Justin Holloway,
I feel I have to personally thank you for your help that you have freely given over the past few weeks. The holidays are always a busy time for us, and your help has proved to be invaluable. You have never complained about any tasks asked of you and you should know that without this help many of us would have been working through the night just to stay on top of everything. I know we asked a lot for you and thank you for all of your hard work. We would hope that you would consider helping us out on a regular basis, I can assure you it is not always like last week. Many thanks once again.