Instructions: Classify the given hotel review based on the sentiment it expresses into two classes: negative and positive.
Input: The service was only subpar and then rooms needed better cleaning. I was at the check in counter longer than expected because they decided to use a trainee to check me in, definitely no fun after such a long flight. There were no clean towels in the room and my bill was returned with room service charges of which I did not order.

Output:
negative