i need a train on friday to arrive by 15:30
user
i have 206 trains that arrive somewhere by 14:30 . where are you heading to ?
assistant
i am headed to cambridge .
user
where are you coming to visit us from ?
assistant
i'll be coming from leicester .
user
would you like me to book it for you ?
assistant
i would just like the id for the train that fits that billing .