"...we wanted to let you know how much we appreciated everything you did for the boys last year. We also want to thank you for your professionalism and consistently timely communication." 

"...it was awesome working with you and the boys thought the world of you."

"...I want to say thank you for everything you have done. (My son) has grown a lot since playing for you. I know how much these boys loved playing for you."

"...(Michael) came highly recommended , and we couldn't be happier with the decision."