Hi, I need an expensive restaurant please. 
There are quite a few expensive restaurants in the city! Can you help me specify by telling me what kind of food you'd like to try? 
I do not care the kind. Please pick one and book it for 5 people at 15:30 on sunday.
Booking was unsuccessful. Do you have a different time or day?
Yes, lets try 14:30 please.
You have a table at Saigon City at 14:30. DGMG8RF8 is your reference number.
Thanks!  Could you also give me info on trains leaving after 16:45 from Cambridge.
Sure.  Are you looking for a train on Sunday as well?  And, what is your destination?
I need one for monday to go to birmingham new street.
I would suggest train ID TR7728 which departs Cambridge at 17:01 and arrives at Birmingham New Street at 19:44.  
That would be good, can I get tickets for 5 people?
Yes, I've booked 5 tickets for you.  Your reference number is LU2SUOW2.
Thank you very much, lovely day to you.
Is there anything else I can assist you with today?
No, I think that is all. Bye. 
Thank you for using our system today!