{"answers": "C", "options": ["f : i 've booked the single ticket for you to boston on may 1st , sir .", "f : here 's the return ticket for you , business class , leaving on may 11th .", "f : ok. a return economy class ticket to and from new york , right ?", "f : first class , sure . a single first-class train ticket to new york for you ."], "article": "m : i 'd like to book a flight to new york , please . f : certainly sir , what date ? m : may first . f : may first . single or return ? m : return , please . i 'd like a direct flight if possible . f : sure , what class do you like ? m : economy class will be fine .", "id": "train_3745"}