Hoping there are some Orbitz experts out there. DSIL bought tickets for herself and my Dad on Orbitz. Returning from Orlando they are on 2 different airlines with a stopover in NY. They were unable to select seats and, with less than 2 weeks before the flights, there are no seats shown as available online. If the unthinkable happens and they don't get seats on the first flight but are sent on a later flight to NY, does the second airline get them seats on a later flight back home? I fly alot but I've never used two different airlines on one leg o a trip. Thanks.