I see on your listing that you don't have instant booking enabled, so it is not possible to book your place without you accepting the request a potential guest sends. note that there is a difference between a booking request and an inquiry: when a guest is serious they send a booking request which you have to accept or decline within 24 hours. if not, you will have to deal with certain penalties by Airbnb.
But often potential guests only send inquiries, which consists of some questions most likely. that is not a binding booking request. still, you should answer, but it is not a booking at that point, thus nothing to accept or to decline.
Best is to study all these things in depth, it's all in the help section.
Once you have accepted a booking request, never ever cancel as a host, that really carries serious penalties!