I am looking for a train. The train should leave on tuesday and should depart from peterborough
There are several trains that meet that criteria. What destination are you looking for?
I need to leave from Peterborough.
How about TR5042 that arrives at 05:19?
I'd like to arrive by 10:45, do you have something close to that time?
There are several trains that meet that criteria. what time would you like to depart?
Departure time doesn't matter, just want to arrive by 10:45 so whatever is closest to that arrival time.
Great, I have a train that meets your criteria. Would you like me to book it for you?
Wait, does this train go to Cambridge? That's my destination.
Yes I have a train that arrives at Cambridge on tuesday at 10:38 would you like me to book that for you?
Yes please book it.
I'd be happy to  help with your request, how many tickets do you need?
Just one please. 
Booking was successful, the total fee is 16.5 GBP payable at the station. Reference number is : ORMU35RU.
I didn't actually need to reserve a seat. Could you comfirm the departure time of that train?
TR9620 leaves at 09:48. Do you need anything else?
No, that's all I need for now, thanks!
You're welcome. Have a safe trip!