Dear Dr Wilson,
This letter has been drafted for fulfilling my need to appreciate the successful surgery which you have performed on me. I would be getting discharged tomorrow morning and I wish to say that what I have desired has been delivered by you and your hospital. Before the hospital, I was suffering through severe pain and have become sceptical about my health. However, the excellent execution of the efficient medication has resulted in my recovery within couple of weeks.
I am very happy and satisfied for the service which was rendered to me. This letter shall reach you with some sweets which are a part of the appreciation which I feel for the successful completion of my treatment. Please, accept the sweets along with my appreciation. I wish you all the best for your medical career and express my gratitude and appreciation to the entire hospital staff for their valuable services.