Hi I'm excited to try an international restaurant in the centre, are they are I can go to?
We have two moderately priced options, the varsity restaurant and bloomsbury restaurant, any preferences?
the varsity restaurant sounds good. Could you book a table for 7 people at 14:45 on saturday?
I have you booked, the reference number is 206RQ761, can I help with anything else?
Thanks! I also need a train from Cambridge to London Liverpool Street.
What day would you like to travel? Is there a time you would like to leave or arrive by?
I will be traveling on Sunday.
There are many trains available on Sunday. Any particular time? 
I need that leaves after 15:15.
TR0189 leaves at 15:59. Is that alright for you?
that is very ok
How many tickets would you like?
7 tickets please and I'll also need to get a reference number from you, just in case
7 tickets on TR0189 is 92.96 GBP. You can pay that at the station. Your Reference number is : GAH6RYK1. Can I assist you with anything else?
No. I think you've met all of my needs today. Thank you.
I am glad to help. Enjoy !