I'm curious if they're still using their mainframe based systems? They've been workhorses over a number of years but show their age when it comes to making quick changes.
With SABRE up and running, IBM offered
its expertise to other airlines, and
soon developed Deltamatic for Delta Air
Lines on the IBM 7074, and PANAMAC for
Pan American World Airways using an IBM
7080.
https://en.wikipedia.org/wiki/Sabre_(computer_system)