Instructions: Classify the given hotel review based on the sentiment it expresses into two classes: negative and positive.
Input: I had to go down to Chicago one weekend for the graduation ceremony of my cousin. It was a sudden trip and I didn't even have the time to book a hotel before hand. When I showed up in Chicago and asked my taxi driver to take me to the nearest good hotel, he took me to Omni Chicago Hotel. I was impressed with how clean it was and they didn't have a problem with getting me a room even though I didn't have a reservation. The staff was friendly to me the entire time I was in the hotel, which was just a short two nights, and the cleaning service was top notch.

Output:
positive