Q: Classify the given hotel review based on the sentiment it expresses into two classes: negative and positive.
Our non-smoking room smelled very badly of stale cigarette smoke. We were not allowed to change rooms. Also, the concierge staff was unprofessional, telling long winded personal stories to uninterested guests while long lines formed. The location was great. Hotel is dated, but would still be a nice place to stay if it weren't for customer service issues.

A:
negative