U: What sort of dining does Cambridge offer in the centre, in the moderate price range?

S: There are 21 different choices. What kind of food are you looking for?

U: I would like some christmas food.

S: I'm sorry. I could not find a restaurant that meets that criteria.  Would you like to try something else?

U: How about somewhere with Lebanese food?

S: Yes, there is a moderately priced Lebanese restaraunt in the centre named Ali Baba.  How does that sound?

U: That will work can you make a reservation and send me the reference number please?

S: of course, what day shall i make the reservation for?

U: Tuesday please at 18:15 for 6 people.

S: Your table at Ali Baba is booked, reference #NYH3ZPQN. Is there anything else I can help you with today?

U: Also, does it have good service?
S: The service seems to vary quite a bit at Ali Baba. Would you like me to find another option or will that work for you?