I want to find a moderately-priced restaurant in the centre.
We have 21 entries that match. Do you have a preference on type of food?
I'd like Lebanese food please. 
ali baba serves lebanese food in the town centre at a moderate price range. Would you like to make a booking?
Yes please. I need a table for 3 at 18:45 on a Tuesday.
I was unable to find you a table at that time. Is there another time that would work for you?
I guess we could move it an hour earlier, if that's better?
That worked.  You have a table at 17:45 with reference number 2S4UXXS3.  Can I help with anything else today?
That's all I needed. Thanks for your help.
No problem.  Happy to help.