Travelocity is offering a price difference refund for online booking.

Late last month, Travelocity started offering a price difference refund for online hotel bookings To travelers who book hotel rooms on its Web site then later find the same reservation at a lower price online anytime before the day they check-in, Travelocity is offering to refund the difference between the prices, the Wall Street Journal reports.
Also through December 30, travelers who find a lower booking price, will receive $50 toward future travel booking on the Web site.
According to the Wall Street Journal, travelers who want to take advantage of that offer, would need to send a screen grab or other proof of the lower rate, to Travelocity.

For more, see WSJ.com