hi , can you find me a train going to birmingham new street that leaves after 16:45 ?
{'service': 'train', 'act': 'request', 'slot_name': 'depart', 'value': '?'} {'service': 'train', 'act': 'request', 'slot_name': 'day', 'value': '?'}
what day would you like to go and where will you be departing from ?