hi , i need a train that departs from cambridge . i need to leave after 15:00 .
user
there are many trains that depart cambridge at that time , what day do you need the train and where are you going ?
assistant
i am going to peterborough on tuesday .
user
i have 18 trains available . what time would you like to arrive ?
assistant
i would like to arrive by 18:00 if possible .