generate response: No, going to cambridge and leaving london liverpool st. I am leaving saturday and want to leave sometime after 18:30. Intent: find_restaurant. Slots: train-day=saturday, train-departure=london liverpool street, train-destination=cambridge, train-leaveat=18:30
Response: TR3940 leaves Liverpool St at 19:39 and arrives in Cambridge at 21:07. Will that work for you?