I'd like to find a train leaving on Friday to Cambridge.
There are 1414 trains heading to cambridge do you have a location you're leaving?
I will leave from Birmingham new street, and arrive by 13:15 if possible.
TR0497 arrives in Cambridge at 12:23. Would you like to purchase tickets?
Yes please, book 4 tickets for me. 
Booked, reference number is T610U5HK. You pay 300.39 GBP at the station. Your train leaves at 9:40.
Thank you very much.  It looks like i am all set.  Have a nice day.
It has been my pleasure. Please feel free to contact us again if you require any further assistance!