How do you confirm your service delivery is satisfied to the customers?

by giving the good service to them serving food in proper sequence   

If the customer comes back to you that would simply mean that he was satisfied with your service last time. We need to remember customer who buys once is just a customer but a customer who repeats his/her purchase becomes evangelists.

You will see customer satisfaction if he/she gave a tip and gave a complement or commendation to the service and most importantly the customer is keep on visiting the store or keep on patronizing the product.

to confirm the service for the customer satisfaction

If my customers write a positive comments in my service delivery.