Bad Timming
You are going into your interview a little unprepaired if you don't know the answers to these questions allready, only three days away.
I am not preaching to you, believe me I am the master procraster!
Here are some tips, I cannot give specific examples since I have yet to attempt any rehearsed lines.
1) Why Airline xyz? - Be honest, and don't blow large amounts of smoke up their ass, the interviewers have done 100s - 1000s of these chats, they have good smoke detectors. Tell them why you want (not need) to work for their airline, and what you can bring to the table.
2) Best/worse - Don't go overoard on the best traits, and the worst give points about you that are actually good but have a slightly negative aspect. My ass is big, but it makes sitting for hours on end enjoyable, get the drift...
My cent, its not worth two!!!
RW