Where are you departing from?
I am looking for a train that leaves on Saturday going to Cambridge. I am leaving Broxbourne and need to be in Cambridge by 10:30.
{"__type": "Request", "service": "train", "values": ["departure"]}
{"__type": "Inform", "entity": {"__type": "Train", "choice": "4"}} {"__type": "Request", "service": "train", "values": ["arrive by"]}
We have 4 such entries. Do you have a time you'd like to arrive by more specifically?