Originally Posted by AKC6

In their world, they changed the equipment and the carrier, not the flight; they are still transporting you from point to point. However, as jrl767 points out, you can change your flight for free--with a human being on the phone. If you see another PBI-MSN itin you like, ask for it.

You don't mention how soon the flights are. There may be another schedule change between now and then, and you could wait for a better itin, but that's a two-edged sword. The nicer seats get taken, or you may be put back on mainline, but an Airbus , and then you're out of luck.