Respected Madame, Sir, and Friends, can someone please help me out in writing a impressive job leaving certifi?

In fact I had worked for nine years as a Driver for the Doctor and Owner of one well known hospital, my duties included as a all rounder for the hospital as well as at Dr. residence. I had even been out of station for Dr. work. I had always been given responsibilities to full fill, and I had done my best. my doctor family had always been very kind to me, Dr. sahib has told me to bring a certificate in written form and he would sign this for me. So, can anyone please help me out in this to form a nice job leaving certificate . thanking you all in anticipation.