generate response: Yes, but first can we work out the train details? I still need more info on that TR4975 train. What's the departure time and travel time on that?. Intent: find_train. Slots: train-arriveby=08:23, train-day=saturday, train-destination=birmingham new street, train-leaveat=05:40, 5:40
Response: TR4975 leaves from Cambridge at 5:01, travels for 163 minutes, and arrives at birmingham new street at 07:44. It costs 60.08. Would you like me to book it?