U: I'm looking for a cheap restaurant in the city centre.

S: There are 15 cheap restaurants available in the Centre area.  Are you looking for a particular type of food cuisine?

U: I'm not looking for anything in particular, could you choose one and book a table at 13:45 for 2 on Wednesday?

S: Unfortunately, that time slot isn't available. Would you like to try a different time?

U: Sure, how about 12:45?

S: I've booked you a table for two at the river bar steakhouse and grill on Wednesday at 12:45. The reference number is TX50SNZS.

U: Great, do you know if they are known for serving large portions of their food?
S: Yes, they do have large portions of their food. Past guests have commented that they were generous and huge.