I'd like to take the train to cambridge from birmingham new street on tuesday, can you help me with that?
I have many trains available on Tuesday.  Do you have a time preference? 
Yes, I'd like to arrive by 19:30, please.
The TR 4631 arrives by 19:23. Would you like to book this one?
Yes, book please and I need travel tome and price 
How many tickets would you like me to book?
I only need one ticket today.
Your booking was successful, the total fee is 75.09 GBP payable at the station. Your Reference number is ZCR9P2WW. Can I assist you with anything else today?
No, thank you for your help
Thank you, have a great visit, goodbye!