Task-oriented dialogue about: train

i i'm looking for a train. The train should depart from cambridge and should go to stevenage.
What day would you like to travel?
I need to leave on thursday after 16:30. Can you provide me with the train ID?
The first train available is the TR4765 at 17:21. Shall I book you a seat?
No thank you. That is all I need.
Thank you for calling the Cambridge Township Centre. Enjoy your day!