Detailed Instructions: Classify the given hotel review based on the sentiment it expresses into two classes: negative and positive.
Problem:The hotel is very impressive upon entering and the staff was very friendly, however we felt our room was very dated and worn looking. Our air conditioning didn't seem to be working well, but we turned it down and thought that it would eventually... cool off. Our first night was interrupted by a phone call at one A.M. That was a fax, it happened 4 times. By this time we realized that the air was not working again, so after fussing with the controls it did kick on. The next morning I mentioned to the concierge the issues with the phone, but didn't think to mention the issues with the air because it appeared to be working. After being out seeing the sites of Chicago for several hours and being very hot we were looking forward to resting in a cool room before going to a show . Our room was 78 degrees, I called and maintenience did come to check. After determining that the unit needed a motor it was another hour so we did not get to rest in a cool room before going out. I feel an offer should have been made to us by the hotel. Also was very surprised that WiFi was not a free service !! We will not be staying at the Hilton on our next trip to Chicago.

Solution:
negative