U: Hi, I'd like to book a taxi. Could you help me find a reasonable price?

S: I would be happy to help you with your request, could you be more specific on where you're departing from and on what day?

U: I'm sorry, I would actually like a restaurant in the centre that serves Afghan food.

S: Unfortunately there are no restaurants in the centre that serve Afghan food. Would you like to look for one in other areas?

U: How about a Chinese restaurant?

S: There's ten chinese restaurants in the centre. Do you have a particular price range you'd like to stay in?

U: A cheap price range.

S: There are three restaurants that meet your requirements:  Charlie Chan, Rice House, and Golden House.  Does any of those sound interesting?

U: What has larger food portions?
S: Charlie Chan and Golden House have more complaints about their tiny portions than generous ones. A review at the Rice House says the portions are quite generous. Would you like some more information on any of the restaurants?