Can you help me find a train please?
Sure! Where are you headed?
I am headed to Cambridge this week.
Where are you leaving from, please?
I will leave from Leicester.
What day would you like to leave? 
Friday is preferable.
There are trains running from Leicester to Cambridge every hour from 5:09 to 23:09 on Friday. Did you have a particular time in mind? Would you like to book tickets?
I'd like whichever arrives by 16:15 please.
TR6247 leaves Leicester at 14:09 Friday and arrives in Cambridge at 15:54. Will that work for you?
That will be fine. book for 3 people
Alright. Booking was successful. Your reference number is 87MI5OVY.
Thanks for your help. That's all I need.
You're welcome. Have a great day.