generate response: Sounds great. Can I get their postcode please?. Intent: book_train. Slots: attraction-area=west, attraction-name=queen's college, queens college, attraction-type=college, train-arriveby=dontcare, train-bookpeople=5, train-day=wednesday, train-departure=stansted airport, train-leaveat=10:00
Response: The postcode for Queen's College is cb39et. And the reference number for your train (booked earlier) is WMUC700A .