Hello. A guest just booked my room and I just saw that the cancellation policy for that booking was Flexible. I have found how to change it for future bookings, but I wonder how do I change it to this current booking.
If it has already been confirmed then you don't have the option to change the cancellation policy of that booking- it will remain as it was when originally booked.
Any changes that you make like cancellation policy, house rules and so on will only have an effect on future bookings.