I am looking for a restaurant in the centre that serves world food.
I'm sorry I can't find any world food restaurants located in the centre. 
How about a restaurant in the centre that serves Korean food?
Little Seoul is a great place that fits your description. Would you like me to book you a table?
Yes please.  I would like a table for 7 on Tuesday.  Try for 11:15 please.
I have nothing available for that day and time slot, can I book you another day or time slot at that restaurant?
How about 10:15?
I have you booked for 7 at little seoul on tuesday at 10:15. Here is the reference number for your booking: KAHFBHYI.
Thank you so much for your help.  Bye.
Glad I could help today, is there anything else that I can resolve for you?