When the waiter answers the guest, he should say: Sorry, the fruit we give to the guest is different every day. If you like watermelon, we will definitely prepare it for you next time! ?

"If you don't eat watermelon, you can't pay the bill." ?

Sir, you often come here for dinner. You are our old customer. Don't embarrass me today. ?

If he insists on this, let him sit for a while and let him do it. ?

In fact, there are few such guests in expensive restaurants. If you build a general consumer restaurant, it is better to pay the bill first.