123, X Street, Y Avenue
[Subject: Normally bold, summarizes the intention of the letter] -Optional-
Dear Austin Parker,
Many thanks for letting me know that Carson’s had been chosen to fulfill our contract. It is good to know that my advice has been heeded on this important issue, and know from my research that Carson’s will be able meet all of our needs, and that there will a successful conclusion to the work.
Please let me know if there is anything further I need to undertake in the matter of this project as I am always willing to offer further advice. I want to see our company continue to grow and prosper.