I need a train from broxbourne on Tuesday.
I can definitely take care of that for you. Where are you heading to? 
Travelling to Cambridge, I need to arrive by 14:45.
We have 9 such trips. Any preference on leaving?
No, but I need two tickets.
TR4537 has been booked for you. lt leaves at 07:32 and arrives at 08:32. The reference number is 8UMHY366.
Great. That's all I need. Thanks.
You're welcome. Have a great day!