i am looking for a train that should depart from cambridge and leave after 15:45 .
{'service': 'train', 'act': 'inform', 'slot_name': 'choice', 'value': 'lots'} {'service': 'train', 'act': 'request', 'slot_name': 'day', 'value': '?'}
we have lots of those ! what day are you traveling ?