generate response: What's the latest train I can take that will still get me there by 12:45?. Intent: find_train. Slots: train-arriveby=12:45, train-day=saturday, train-departure=peterborough, train-destination=cambridge
Response: The latest train leaves at 11:48 and arrives at 12:38. The cost per ticket is 13.20 GBP. Would you like to book this train?