Hello, I'd like to dine at a cheap restaurant in the centre. What do you suggest?
There are several what kind of food do you want? 
How about Chinese food?
Try dojo noodle bar located at 40210 Millers Yard City Centre
Thank you. I am also looking to book a train which leaves on Sunday after 21:15.
I can definitely help with that. Where will you be traveling from/to?
I'll be going to broxbourne from cambridge.
The TR3697 leaves at 22:01 and arrives by 23:01. Would you like me to book this train? 
Yes can you book that for 6 people and give me the reference number?
Booking was successful, the total fee is 85.92 GBP payable at the station. Reference number is : S9DHM1KG. Can I help with anything else today?
Great that was all I needed today, thank you for your help
You are welcome. Have a lovely day.