i would like to find a train going to cambridge that leaves on sunday . i would be leaving from peterborough . i need to arrive in cambridge by 19:30 though . my departure time is flexible .
ok , and where are you departing from ? okay , there are a few trains available . what time would you like to depart ?
{'service': 'train', 'act': 'inform', 'slot_name': 'id', 'value': 'tr3782'} {'service': 'train', 'act': 'inform', 'slot_name': 'leave', 'value': '05:19'} {'service': 'train', 'act': 'offerbook', 'slot_name': 'none', 'value': 'none'}
the earliest train is tr3782 which leaves at 05:19 , would you like me to book some tickets for you ?