It is easy to find templates for writing all sorts of things. We wanted to write a thank you letter to the Plant Sale volunteers and there are many websites that provide examples and samples.
There are many volunteer websites. It turns out that the thank you letter is the key to success in retaining donors/volunteers and increasing donations. There were some excellent saying for thank you so here are two thank you cards. Thanks is a form of gratitude which is an active area of study. Here's a website happier human that lists the 31 benefits of gratitude.