i need a train departing from cambridge and arriving by 20:45 .
user
what day are you traveling , and to which station ?
assistant
i'll be traveling on wednesday , and i will be go to peterborough .
user
we have 30 such entries . do you have a time you would like to leave by ?
assistant
any time is fine as long as i can book for 4 people . i also need the reference number , please .