1 nick rigby #BookingHeroes cancelling my guest bookings I'm trying to find out how to cancel a guest booking and what is the charge for this? I over booked! 9 Sharonpowney You cannot cancel a guest booking. Only the guest can cancel. If I need to do this I usually have a look at other local accommodation so that when you message the guest and tell them you need to cancel you can list them some alternatives. That way the bad news isn't so bad. If the guest doesn't read the email then you can ring booking.com and get them to contact the guest directly.