As in any business it's common to get lots of inquiries that don't turn into a sale @Tim4881
The more comprehensive your listing the less likely you are to receive inquiries about facilities not available at your listing .
some will be scammers, some time wasters etc
airbnb uses AI tools hence why you keep getting requests from them just ignore them .
if it's an inquiry you don't need to decline - just respond .
you can use PMS software to avoid double bookings .