Mandy was going to Pairs. She had a coach (客机的二等票) seat. When she got on the plane she sat in first class. A stewardess came and told her to go into coach. She said she wouldn’t move. The co-pilot came and whispered something in her ear. She got up and went to coach. The other two asked how he did it and he said he told her this part of the plane wasn’t going to Pairs.