"I would like to commend your services and hope to work closely with you again."
"Thanks for all your help David, we couldn't have done all this without you - a great result and you can quote me!"
“Now that completion has taken place I would like first to congratulate you and moreover thank you for years of advice and assistance. This is something that I will never forget”
"Thanks a lot David - We really appreciate your quick response and instant initiative to get this fixed before the weekend."
"Thank you David for everything."
"I just want to take this opportunity to thank you all for your very friendly and courteous services."