@Zach113 refer your guest to your cancellation policy. Even though it is set to flexible, I don't believe she would get any kind of refund. I wonder how on earth she came up with a figure of 70%. Was this a 2 night booking? If so, the very most she should be asking for anyway is 50%, especially given that she is checking out late. Also, what is her reason for leaving early? I would only consider a refund if it's because something was wrong with the accommodation. If she just changed her plans, then no refund. Just no.