Classify the given hotel review based on the sentiment it expresses into two classes: negative and positive.
Q: The Conrad Chicago hotel had some of the worst service I have ever dealt with. I got the Executive Room with a king size bed. When I got in, the sheets were stained with some type of chocolate or mud. I called down to front desk and it took them an hour to come up and change them for me. They have a pillow menu which I tried to select from but they were out of over half of them. The Ipod dock was not working either. Also, the room service servers were very short with me and delivered my food luke warm. This hotel is the worst in Chicago and I would never recommend going there!

A:
negative