Close Hotel Room Graduation Weekend

My parents booked a room for my grandpa at a hotel right next to campus, but he is no longer able to come and the hotel will not let us cancel our reservation. We are hoping to make some money back. Please reach out if you are need of a room close to campus (we have two and are willing to part with both). It is a room with two queen beds for Saturday and Sunday nights. Looking for $350 per night which is below the hotel's asking price.