"Just a little note to let you know how much I appreciate your helpfulness, guidance, and suggestions in our recent project.  The colors came together beautifully and I couldn't be more happy with the quality of the products we purchased from you.
  I truly appreciate having the opportunity to browse without being bothered, the professionalism and courtesy extended to me in our interactions, and especially of your time, talent and energy in helping me coordinate styles & color.  I absolutely love my new living room and the kitchen flooring is amazing."
Sincerely,
Jennifer - New Holstein