Task-oriented dialogue about: train

I need to find a train departing from Cambridge that arrives at 18:00
What are the other requests?
I need to go to leicester from cambridge, and i need to leave on sunday.
There are many trains available. TR5173 leaves at 08:21 and arrives at 10:06. Would you like me to book that for you?
Great can I get TR5173 booked for 3 people please?
OK I booked that for you. The total fee is 90.72 GBP and your Reference number is : AVE1068H .
Thanks so much. I appreciate the help. Have a nice day.
Okay thank you for calling.