First of all, this is normal in large hotels. After serving the wrong dish, just leave the table and don't go back to get it back, so customers will wonder if I will return it to others after I move the chopsticks. If so, my food will probably be eaten by others.

About the treatment of wrong dishes:

Say "Oh, I'm sorry" to your guests in a friendly manner. * * Thank you for your tolerance. If the food has been eaten by other guests by this time, you can take out the menu and tell the guests to discount the cost price by 20% and 30%.

So many people are willing to accept it, but before that, you should discuss with your supervisor and admit your mistake. If you want to investigate, the waiter will take 99% responsibility.