i need to book a train . i am at bishops stortford and would like to go to cambridge .
where are you departing from , and what is your destination ?
{'service': 'train', 'act': 'inform', 'slot_name': 'time', 'value': '38 minutes'} {'service': 'train', 'act': 'request', 'slot_name': 'day', 'value': '?'}
the travel time for that route is 38 minutes . what day would you be traveling ?