Dear Felix
We wish to thank you for your efficient handling of the insurance forms for our recent visit to your hospital. As out-of-state travelers, we feared that the paperwork would be a nightmare, but your competent staff knew exactly what to do. In a surprisingly short time, they had processed the forms, and we were back on our vacation. Please give this box of chocolates to the staff at the front desk with our compliments and thanks.
Regards
Lydia