i need to find a train that departs from london liverpool street .
{'service': 'train', 'act': 'inform', 'slot_name': 'choice', 'value': 'many'} {'service': 'train', 'act': 'request', 'slot_name': 'day', 'value': '?'}
there are many options that may suit your needs . is there a particular day you are wanting to travel on ?