Moderator, Omni, Omni/PR, Omni/Games, FlyerTalk Posting Legend
Join Date: Oct 2004
Location: Between DCA and IAD
Programs: UA 1K MM; Hilton Diamond
Posts: 72,448
You can contact Hilton customer service and ask them nicely; they may refund the one night.
Unfortunately, when you book a non-refundable rate, you run this risk. Trip insurance would have covered it most likely--though in general, I find trip insurance to be unnecessary.