Should a Host Cancel or change a Guest Reservation?
NO – Do not cancel or change guest reservations! Have the guest log into their account and cancel their reservation, or change their own trip dates. Believe me – it is better as a Host to stay of doing either of these things for your Guest. Ask them politely to do this themselves.
https://www.airbnb.com/help/article/913/changing-a-reservation-for-a-place-to-stay