Task-oriented dialogue about: train

I am looking for a train departing from Bishops Stortford.
There are 70 trains departing from that location, would you like to narrow it down some?
I am looking to go to cambridge on thursday.
I have 10 available trains. Is there a particular time you would like to leave or arrive by?
I need to leave on Thursday and get there by 9:15, is that OK?
Yes. There are two available trains. One leaves at 5:29 and arrives by 6:07 and the other leaves by 7:29 and arrives by 8:07. Which would you prefer?
I'd like the later one, please. I'll need 8 tickets.
Sure, we have one other option TR1242 leaves at 07:29 and arrives at 08:07. For 8 people your reference number is : 6A76VGSK .
Okay great! Thanks for all your help.
It's my pleasure. Goodbye!