U: I'm looking for a moderate place to stay in the centre.

S: The City Room Hotel meets your requirements. Do you need the phone number?

U: Does it have four stars?

S: I'm sorry, it only has 0 stars.  Would you like to try a different part of town?

U: No I would like to stay in the centre. Can you recommend a cheap one in that area instead?

S: The Alexander Bed and Breakfast has 4 stars and is within your price range. Would you like me to book that for you?

U: Does it have clean rooms?
S: Most of the past guests of Alexander Bed and Breakfast were satisfied with the cleanliness while one guest said that the cleanliness was not acceptable.