Example 1: Thanks for a special service Dear Mr. Smith I would like to take this opportunity to thank you sincerely on behalf of my marketing team for attending our workshop yesterday. It was generous indeed of you to give so much of your time and effort to make our meeting a success. The consultants were extremely keen on having one or two of our outside people at the workshop and they are also grateful for your contribution. Thanks again for your valuable help and useful suggestions. Please feel free to contact me anytime you need cooperation. Sincerely your