Domains: restaurant, train

user: Need a train leaving on Thursday after 14:30

assistant: I found 195 trains that match your prerequisites. What is your destination?

user: I am going to London Liverpool Street from Cambridge.

assistant: Train TR3237 arrives at 17:27 and cost 16.60 pounds. Would you like me to book it?

user: No thanks, I'm not sure how many seats I'll be needing yet.

assistant: Okay. Just call us back when you do.

user: Oh, I am also looking for an African restaurant in the centre...North African, to be exact.

assistant: There aren't any in that particular area, do you have any alternative preferences?

user: Hmm, can you see if there might be an expensive restaurant that serves specifically "north african" food in the centre of town?

assistant: I apologize, but we are don't have any North African restaurants in this town at all. I do have an expensive African restaurant in the centre. Will that suffice?

user: No, if I can't get North African I'd really prefer something radically different. Chinese, maybe?

assistant: How about the Ugly Duckling? They serve chinese food and are located in the centre of the city.

user: Okay. can you book me a table for 7 at 11:00 for Thursday?

assistant: That booking was unsuccessful. Would you like to try another time?

user: Sure, can we try for 10:00 instead?

assistant: Booking for 10:00 was successful. Your reference number is XVUUCPBH . Is there anything else I can help with?

user: That will be all, thank you very much.

assistant: You're welcome. Have a great day!