If you list your place on Houfy and other websites, you can prevent multiple guests from booking the same dates by syncing your Houfy calendar with your other calendars.
The "correct" way of Synchronizing Calendars: (assuming 3 sites)
- Import Airbnb + VRBO to Houfy
- Import Houfy + VRBO to Airbnb
- Import Airbnb + Houfy to VRBO