@Wendy117
The booking you describe seems to be a 3rd Party Booking.
If that's the case, are you aware that 3rd Party bookings are not strictly permitted?
They are tenchnically not permitted at all from apersonal account.
There is the Business account which is effectively a 3rd party booking.
If a Host knowlngly accepts a 3rd Party booking from a personal account, then Airbnb will still process the booking, but not accept liability in the event of any problem occuring.
If a 3rd Party booking is undertaken without disclosure prior to booking, the Host has the right to Cancel the booking at any time, notably even when the 3rd party arrives.
Lastly, if you chose to accept a 3rd Party booking, it's advisable to inform the booker of the Airbnb rule, and request the booker acknowledge the rule, and 'accept liability in any eventuality'.