Sample 1:
We want you to know that we are very pleased with the quality of service your company provides. We sincerely appreciate your responsiveness and the way you conduct business. We have recommended your company to others because of our satisfaction with your service. We look forward to doing business with you for years to come.
Sample 2:
We want you to know how much we appreciate the way you have cared for our lawns and flowers this year. I can’t remember a time when our lawns have looked so nicely groomed and weed-free, or when the flowers have been more beautiful. Several visitors to the corporate headquarters have commented on how nice things look. Thank you for your excellent service.
source: abusinessresource.com