I need to find a train that is going to arrive in stevenage by 11:45.
The latest train arriving in Stevenage is for 10:10 and there are several: TR6334, TR8290, TR7542.
Which one would you like to book?
That's all up to you!
book TR6334 and get me the train ID please
TR6334 is the train ID, would you like to book a seat?
Yes, book one for me please. And please make sure this is for Sunday.

Booking was successful, the total fee is 10.24 GBP payable at the station .
Reference number is : 92RW4C6C.
I didn't need to book a seat, I just needed a train ID number.
As mentioned before the train number is TR6334, you did ask me to book.   One more time, what exactly did you need?
Sorry about the confusion, I just need a train from Steveage to Cambridge that arrives by 11:45. I just need the train ID.
TR2860 arrives at 10:43. 
Thank you that was everything. Goodbye.
You're welcome. Goodbye!