"Hi Wil, it has been great knowing you. I was pleased that you came when I really needed you. Thank you for the service you have given me to look after my restaurant website.
I always find you on the other side of the telephone when needed. It is always good to know there is someone there when needed. I hope to use your service as long as I am in the restaurant.
I will be recommending you to all my business colleagues no doubt.
Looking forward for the future."