Foresttrip's official FAQ says reservation dates cannot be edited: cancel the existing booking and book again. Cancellation penalties may apply. Waitlisted visitors can receive an opening only if someone cancels. Check My Page → Reservation Applications → Waitlist Applications, as notifications may be missed. When an opening is offered, confirm the pending reservation and pay from Payment Pending. Partial cancellations may be available before check-in, but for unused nights after check-in contact the individual forest lodge. National, municipal and private facilities may differ.