Task-oriented dialogue about: train

am looking for a train it should leave on sunday and should depart from bishops stortford
Thank you. Where is your destination?
I'm going to Cambridge.
What time are you looking to depart/arrive?
I want to depart after 18:30.
TR0053 leaves at 19:29 and arrives at 20:07. Do you want me to book this train? I will need your details, please.
Yes, I need 1 ticket and can you please give me the reference number?
Booking was successful, the total fee is 8.08 GBP payable at the station . Reference number is : 6W3KFY5N .
Thanks ever so much! You've been very helpful.
You are very welcome! Have a nice trip.