Student or Learner
I would like to know why the next passage is funny.
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 also be in the airline business, so I smiled and asked why.
Replied the woman, "She's a dentist."
The contrast between the narrator's comments on people's reaction to her as a qualified pilot and the woman's concentration on her dental care. The expectation in the joke is that the comment is going to be about her as a pilot.