Task-oriented dialogue about: train

Hi. Can you please help me find a train to Leicester. I need to leave on Monday.
Do you want to arrive or leave at a certain time?
Yes, I need to leave sometime after 20:00 from Cambridge. It doesn't matter when I get there.
Okay TR9424 departs at 20:21. Would you like me to book that for you?
Could you book a trip for five people, and give me the reference number?
I have those seats booked for you. Your reference number is Q0B623JD . You will pay 189 gbp at the station.
Thank you that's all I needed today.
You're welcome. Have a great day!