As one of relatively few female airline pilots, I've often been mistaken for a flight attendant, ticket agent or even a snack-bar employee.  Occasionally people will see me in uniform and ask if I'm a "real" pilot.  Still others congratulate me for making it in a male-dominated field.       

One day, I was in the restroom before a flight.  I was at the sink, brushing my teeth, when a woman walked through the door and looked over at me. "My sister would be so proud of you!" she remarked.

I figured her sister must be in the airline business, so I smiled and asked why.  Replied the woman, "She's a dentist."