Since your rooms are in a hotel, @Melanie467, I would imagine you have a better chance than many of us to get a booking for all or some of the dates that she cancelled. Presumably the reason for the cancellation does not meet the extenuating circumstances criteria and the Air BNB rep granting a full refund, you could promise to refund for any booked dates. That way you are not being paid double for the same listing and the guest will perceive your fairness.
I don't think the guest can write a review when cancellling 5 days out from check in.