can you help me find a train arriving at 18:15 going to cambridge ?
user
sure ! where are you heading in from ? and what day ?
assistant
i am leaving peterborough going to cambridge on monday and i need to get there by 18:15 , can you help me with that ?
user
sure thing , would you like me to book this for you ?
assistant
i'll need passage for 5 , but i also need to know what time the last train gets there before 18:15 .