Speak clearly and at a moderate volume. It is best to use standard mandarin. However, if guests speak dialects, it is necessary to cooperate with the convenience of guests and enhance the effect of mutual communication.

We should have the concept of first come, first served. The guest who comes first should serve first, and the guest who is late should kindly ask him to wait for a while, and can't ignore or put the cart before the horse to greet the guests behind.