can you help me find a train leaving on sunday and arriving by 18:15 ?
{'service': 'train', 'act': 'request', 'slot_name': 'depart', 'value': '?'} {'service': 'train', 'act': 'request', 'slot_name': 'dest', 'value': '?'}
where are you departing from and what is your destination ?