U: I want to find a guesthouse in the south area of Cambridge.

S: I found a few different options, ranging from cheap to moderate. What is your price range?

U: Expensive. Thank you.

S: I do not have an expensive guesthouse in the South.  Would you like to try a different area of town?

U: Yes, try the north please.

S: I would suggest avalon. Do you need me to book this?

U: actually, i still want a place in the south. maybe try a moderate price range.

S: Bridge guest house is a nice place would you like me to book it for you ?

U: It's very important it has a comfortable mattress, does it?
S: People's views are mixed with regard to the comfort of the mattress. Some people found them comfortable, but others said it was extremely uncomfortable.