Yes, the majority of hotel bookings are fully refundable as long as you cancel prior to the hotel's cancellation deadline, which is often 24 or 48 hours before your arrival date. If you have a reservation that's non-refundable, you might be able to cancel it and get a refund within a 24-hour period of your booking. Enter dates in and click on "Search", then filter by "fully refundable" to get top deals close to Nanga Parbat.