U: I need a train ticket to Cambridge, sometime after 15:45 if you can find one.

S: There are over 600 trains to Cambridge that leave after 15:45. Can you tell me the day you're traveling and your departure station?

U: departure is sunday from ely.

S: I found four trains, one leaves at 17:35, 19:35, 21:35 or 23:35. Which would you like to book?

U: I'll book the one that leaves at 17:35. What time does the train arrive?

S: It arrives at 17:52. Shall I go ahead and book it for you?

U: No. I'm looking for a a gastropub restaurant in the centre.

S: There are 3 gastropubs in the centre.  2 are expensive the other is moderate. Do you have a preference in the price range?

U: Yes, I need one in the cheap price range please.

S: There are no gastropubs in the centre part of town in the cheap price range. Would you like something else?

U: Ok, how about one serving italian food?

S: Pizza hut city centre, ask, and zizzi cambridge all are italian restaurants in the centre part of town in the cheap price range. Would you like me to book one?

U: Yes. Can you please book Zizzi Cambridge for 3 people at 21:00 on the same day, Sunday.

S: I have reserved a table for three at 21:00. The reference number is OUN5OI0K.

U: Great, but it is a special night for me so can you check if they offer a great view for its diners?
S: Some of the seats have a nice view next to the water, but others said that the views weren't great. Do you want to change your reservation?