On the Monday after the original flight was cancelled, I understood from other passengers who waited for hours the previous Sunday in the Denver airport that the flight from Denver to Steamboat Springs was delayed. I arrived in Denver about half an hour before the flight was officially cancelled. After walking all the way to the gate to find no explanation about the delay and no one to assist me, then walked half way back to the United Customer Service area. While waiting in the very long Customer Service Line for about ten minutes, I received a text about the flight being cancelled. It was already evening and needed to find out what would happen to my luggage, so then took the train to Baggage. The United Rep. who worked in baggage had no explanation as to why the flight was cancelled yet assured me that my luggage would be on the morning flight out to Steamboat. I couldn't understand how the people who work for United had no explanation either. The rep. did apologize and kindly handed me a United water bottle with small toiletries in it. I suppose I was supposed to spend the night in the airport. So, I was now without a place to spend the night, had no extra clothes or sleepwear. Plus I'm now going to be out of pocket for a hotel, dinner and breakfast.