How to reply when a friend helps his daughter as a matchmaker?

You can say, thank you for your trouble. Please pay more attention when you have a good partner in the future. People introduce your daughter to someone because of your face. First of all, you should thank them politely, no matter what the final result is. Secondly, the success rate of introducing objects is low. At this time, you must leave a back way, so that people can have confidence and motivation, and then help you introduce them.