U: I'm looking for a place to stay during my upcoming trip to Cambridge.

S: What price range and what area are you looking for?

U: I would like to stay in the north I have a moderate price range.

S: There are 11 places that meet those critieria.  Are you looking for a particular star rating?

U: Yes,  I would like something with a 4 star rating, and I would like for it to be a guesthouse.

S: I would suggest acorn guest house.

U: Does the Acorn Guest House feature clean rooms?
S: For the majority of past guests, the Acorn Guest House provided bathrooms that were immaculate and well-kept.