The first rule of being a good server is to remember the customer is always right. This is a job for you, but an experience your diners are paying good money for. As such, if the food comes out not to their satisfaction, don’t try to argue. Instead be polite, immediately offer to take it back and get them something else and then tell your manager, who will usually come to the table and speak directly to the customer. This will also help a receive a good tips .