Girl in airport yelled at me for saying "I can't overstate that enough"

I was at the ticket kiosk printing my boarding card when I hit the button that said: <br><br>"Are you bringing a bag?" <br><br>There was a recording that said "Are you bringing a bag on the airplane? Can you tell me, Yes or No?" <br><br>I said, "Yes!" <br><br>Then there was another, "I can't hear you." <br><br>A girl sitting nearby said, "It's not listening to you." <br><br>I said, "I can't overstate that enough" <br><br>There was a pause, and she suddenly shouted at me "FUCK OFF!" Then, she got up and walked away. I don't know why she was so upset.