You have no relationship to Travelocity and no obligation to even speak with them.
I'm guessing they are trying to snag your cabin so they can make a sale. Hope they have not misrepresented to HAL and gone and sold your cabin saying you agreed to move.
Let us know how you make out.
I agree you should give up that cabin to a person who needs it but only if you are advised of that by your TA or HAL and they inform you to what cabin you are being moved.
I do not think you are entitled to any special courtesy as you, as an able-bodied person, knowingly booked that cabin and were advised it was possible you might have to give it up.
It's simply the right thing to do and no 'reward' should be expected IMO
(I'm not implying you are looking for something.)