Is there a day you need to leave? Do you have a time you need to leave or arrive?
I'm sorry, I actually need to travel from Broxbourne to Cambridge. And yes, I actually do need to leave after 13:00 on Tuesday.
All right, the TR8199 train leaves at 13:32 on Tuesday. Would you like me to purchase tickets for you?
Yes, that would be great. I need 8 seats.