there have been several times when your empathy and listening have helped me greatly.

Dear Dr. Leder,
I realized from being ill, one, or maybe the most important factor in decreasing one's suffering is knowing that someone cares about what happens to you despite the outcome. This is especially true for me. Even during our short association there have been several times when your empathy and listening have helped me greatly.
You should let me know if you don't want to expand your practice because I am recommending everyone I know to you.