generate response: You have no trains departing Cambridge to london liverpool street on Wednesday that will arrive by 8:30?. Intent: find_train. Slots: train-arriveby=08:30, 8:30, train-day=wednesday, train-departure=cambridge, train-destination=london liverpool street
Response: Oh wait I have found you one that departs at 5:59 and arrives in London at 7:27. would that do? Everything else is later.