A manager would like to see that you have thought about your future and what direction your beauty career is headed.

The only wrong answer here would be "I don't know." However, she is looking for your professional goals rather than your personal goals.

If you want to someday own a salon talk about the path you intend to take. Let her know that you desire to be in management to gain the experience.

No one expects you to have your life plan laid out already. But she would like a general idea of your direction. If you really just don't know pick the hair activity you like the most and make a tentative goal of it. For example you may like doing color. You could say, "I love doing highlights and learning coloring techniques. I plan on becoming a master colorist within the next 2 years and then see where that takes me."