U: I'm looking for a restaurant that serves gastropub.

S: There are four gastropubs in Cambridge. Is there a price range you prefer?

U: Expensive. And in the centre, if you can.

S: I have the Backstreet Bistro or The Slug and Lettuce. Would you like me to book a reservation at one for you?

U: Which of these offers generous food portions?
S: Both places have mixed reviews with some customers loving the generous portions while others thought the portions were very small. Would you like me to find a place with better ratings?