Task: Wrong Candidate Generation
Input (English): Context: WRONG . Air Canada decided that it would be an awesome idea to only add the fuel surcharge after you have selected the flights you wanted , and to go to the states ? $ 200 , plus tax . 
Question: Why may they have been upset with Air Canada ? 
Correct Answer: All the charges were not visible until later .
Output (English): Air Canada added tax to the flight .