"Thank you for being a dear sweet voice on the other end of the phone, and for your emails letting me know things that may help my family and myself or something that may have been an interest to us. Thank you for always starting out your telephone conversation with a friendly hello and asking about my mom. That truly meant a lot to me."
"It's just nice to know that you're out there helping people like us."
"Thanks so much for calling today! I already feel better about getting my uncle what he wants and needs. You and your company are angels."