Apparently I got a notice from Delta that my flights from PBI-MSN via ATL were both changed. My first was an MD90 changed to a 757-200 which is not a bad replacement considering I'm already on another MD90 on my way out to PBI, but my other flight on ATL-MSN which was on a B717 which now it arrives a few minutes later but IT WAS REPLACED WITH A STUPID CRJ-900 DAMMIT!!!!!!! And there goes my chance on a Delta 717, which I've really wanted to fly on, and now I can't even change my seat what do I do can I change my flights?