{"answers": "D", "options": ["f : no problem . a first class for your return flight , 500 dollars .", "f : i 've booked business class for your return flight on the 28th .", "f : economy class for flights to and from shanghai . $ 500 in total .", "f : 441 on july 7th . also economy class like the return one ?"], "article": "f : good morning , northwind airways . may i help you ? m : yes , do you have any afternoon flights to shanghai on july seventh ? f : one moment please . yes , there is a flight at 12:45 pm and one at 4:40 pm . m : either of those would be fine . can you tell me how much a return flight would cost ? i 'll be returning on july twenty-first . f : economy , business , or first class ? m : economy , please . f : ok , that will be $ 500 . which afternoon flight would you like to take on july seventh ? m : the 441 .", "id": "train_1249"}