Task-oriented dialogue about: train

I am looking for a train. I need to leave Cambridge and I would like to arrive by 09:45.
Could you tell me your intended destination please?
I need to get to the Stansted Airport on Thursday.
I have four different trains that would get you to Stansted Airport by 9:45 on Thursday. What time would you like to leave?
It doesn't matter what time I leave, just so I arrive by 09:45.
How about TR7966? It leaves at 05:40?
Sure. can i just get the travel time and departure time please
Train TR2547 arrives at Stansted Airport Thursday at 8:08. Travel time is 28 minutes, and you would leave at 7:40. Can I book it for you?
No that won't be necessary. Thank you for the information.
You're welcome. Please let us know if there is anything else we can help with.