i am looking to get on a train on saturday . i am leaving from london liverpool street and i need to arrive in cambridge by 09:30 .
from where to where ?
{'service': 'train', 'act': 'inform', 'slot_name': 'arrive', 'value': '9:07'} {'service': 'train', 'act': 'inform', 'slot_name': 'id', 'value': 'tr2503'}
the tr2503 will get you to your destination at 9:07 .