"I just wanted to thank you for all your help with my dad's funeral.  Planning a funeral can be very stressful, but you took such care that we were never confused or stressed about anything.  It was so easy to call and talk with you and ask questions.  You presented all the options to us clearly to let us decide about things, and then you made them happen at the service so we didn't have to do anything.  You are so very good at your job."