Flightiness~~~~

Today I meet a woman who works at McDonald's. At that time, I ask her whether works at McDonald's has the vacancy or not. She says " yes!! but it lefts over graveyard shifts. " Too good!!! That is my wish to do this time. So I talk to her what time can I do this job happly. But she say "You entire felt to me. If I use one word to describe you. Flightiness!!! " I know but that is me!! So I can not explain.................