i am looking for a train going to cambridge and arriving by 2:45 pm . can you help me ?
user
i can help with that ! what day would you like to depart ?
assistant
i am leaving from london liverpool street on wednesday please .
user
trains leave london liverpool street every 2 hour -s beginning at 5:39 . the latest leaves at 11:39 and arrives in cambridge at 13:07 .
assistant
give me information on the latest 1 .
user
the latest train leaves at 23:39 .
assistant
what is the id for the train leaving at 11:39 ?