It depends on your skill. You can say: Your food is being cooked, and it will be served right away. Sorry to have kept you waiting. I'll rush it for you and give you priority.

If you tell your guests this, they will usually wait. Remember to go to the kitchen immediately and give priority to the chef's cooking skills, otherwise the guests will be kept waiting too long.

In fact, there are many skills, but if you really meet a difficult guest, you can use many methods to save it. If all else fails, report to the superior and let him handle it.