But, that deposit can be applied to a future trip. You don't "lose" that money unless you don't reschedule the trip at all. Make sure those are the terms of that specific reservation though (the 6 day cancel).
I had made a reservation last Oct that had a 45 day cancel for a room-only reservation. Another reservation I had for this past January was only the 6 day cancel, so check the cancel policy on your specific reservation to make sure.
Of course if you cancel before the time period you will get a full refund.