I got notified that there was a problem with train 301 (CHI-STL) on 30Jan and my ticket was no longer valid. I cancelled and refunded. I see on Amtrak.com that the train is listed as sold out. Poking around at other 6-7am departures, they are also showing sold out, though 1 Hiawatha is operating at 8am. Guess that's the only way to cancel is to sell out the train so that people can't book it? I suspect this is weather related.