Classify the given hotel review based on the sentiment it expresses into two classes: negative and positive.

Input: Consider Input: My family booked five nitghts at the Omni Chicago for our upcoming spring break. We took advantage of a pre-paid, non-cancellable offer. We subsequently received a "Bed & Breakfast" offer via email and immediately called the hotel to inquire whether we could switch our reservation (same dates, different offer). We called the 800' number and the customer services representative was so obnoxiously condescending and ignorant, we simply hung up. We had been looking forward to our vacation, but now I am not sure I made the right choice with this hotel. I should have paid closer attention to the reviews - the Ritz, the Four Seasons, and the Peninsula would have never treated us this way. I will post again after our stay on April 17th.

Output: negative

Input: Consider Input: If you are ever going to visit Chicago and need a place to stay I recommend this hotel. This hotel made my stay in Chicago one that I will always remember. The rooms were very big and luxurious, everybody was friendly and showed a fabulous display of customer service. The room service always got there when they said it would and it was nice because it was 24 hours so I could get anything whenever I wanted. The price of this hotel for my stay was unbeatable especially because I got great service and I saved a lot compared to the rates of other hotels in the area and their two restaurants were exquisite. If you are ever going to be in the Chicago area and need a hotel to stay in I recommend this hotel!

Output: positive

Input: Consider Input: The Conrad Chicago is a Michelin rated hotel, so I was expecting great service and wonderful accommodations. Well, only one part of that was correct. The rooms are indeed nicely furnished, but the service was terrible! The concierge was unable to find my room reservation (I reserved online and even had the email confirmation) and wasn't very helpful in getting me a new room. I ordered room service, and the wait time was so long that the food came up cold. I mean, I understand that it would take time to get the food prepared and up to my room, but really? For the price I paid, it was definitely not worth it, and I would never use this hotel again.
Output: negative