I am about to book a trip to Long Island to Ft lauderdale on a Wendesday to Friday - not during anysort of break - right now fares are around 119 Each way. If a ding comes out - I can get my price lowered, Correct? and I get a credit? How long is the credit good for? And when does the credit time start? If it is a year - do i have to fly within that time or just rebook?