I worked in a hotel and booked a wedding reception, but a month later I informed him with the manager. At the same time, we helped him find a hotel and the food was discounted.

Judging from the specific situation, it was your hotel that broke the contract first, but you informed the other party in time and took corresponding remedial measures. Now that the contract between you has been terminated, it depends on how you agreed when you concluded the wedding banquet contract. If there are corresponding terms, we must act according to the contract. If there is no corresponding agreement, you should coordinate with each other. You can choose to continue to talk about the amount of compensation or solve the dispute between you through legal channels. It is important to keep the evidence of what you are doing now, which can be used as the basis for future litigation.