I want to get a train out of Cambridge that departs after 20:45 please.
What is your destination and day of travel?
I wish to go to New York City leaving this Friday.
I'm sorry, but I can't help you with travel outside of Cambridge and the surrounding areas. 
Ok. How about a train to the Stansted airport?
I found three, one leaving at 21:40, 22:40, and 23:40 which would you like to go?
I would like to book the 21:40 train on Wednesday for one person please. I also need a reference number please.
Booking was successful, the total fee is 10.1 GBP payable at the station. Your reference number is : VJ3ZAO4F. Is there anything else I can help you with?
Yes, I am also looking to eat some north african food.  Can you help me find a restaurant?
I cannot find any restaurant that serves north african food in the area. 
How about Thai food?
There are 2 restaurants that serve thai food; one in the west and one in the centre. Do you have a location preference?
The one in the west works please. Can you pleas book it for me on the same day at about 13:15.
How many people will be dining?
I'll be dining alone.
Unfortunately no table is available at that time do you have another time?
Could you please check for a table at 12:15 and can I have the reference number?
Alright, I have you booked at Sala Thong at 12:15. Reference number is: QIH3G407. Can I help you with anything else?
No, that should be everything. Thank you very much!
You're welcome - safe travels!