Q: Classify the given hotel review based on the sentiment it expresses into two classes: negative and positive.
I have no idea why this is considered a four star hotel. The Omni Chicago's age shows, and not in a "great ambiance" way! The rooms are dingy and just plain worn looking. I say rooms because we had to switch our original room as there was a terrible musty odor, almost like mildew, that permeated the first room we were given. Seriously, it brought tears to my eyes! The staff seemed rather indifferent to our dilemma, but finally agreed to switch us to another room. The new one didn't smell, but was clearly past its prime. Housekeeping was almost nonexistent. We had to call them back both days of our trip to empty the trash and for towels. How can you forget to leave towels for the guests? I'm not one to complain, but for the kind of money we spent for a weekend here, we were expecting at least a little luxury and special treatment. We received neither and will not be returning to the Omni Chicago.

A:
negative