You can first reason with its first good to hear, if you really do not listen or unreasonable words, you can tone of voice to focus on, for example, if these if you get the police station is what the consequences, even if the lawsuit is what the consequences of letting him know that he is in this regard is unreasonable, if really unreasonable, directly hit 110, but the catering industry is still valued for the sake of peace, after all the amount of peaceful solutions, the big things into small, small things into a small, I'm just In the restaurant work, we that if the dish above the problem will first apologize to the guests, the general guests will be forgiven, encountered some not very reasonable guests, there is no way to solve the problem only with the money, to give them a discount, or free meals, but the general guests are still very reasonable