"Flight!"
No response.
"Flight Sergeant, I am addressing YOU!"
No response.
"Flight, I will be speaking to your CO when I next see him"
"Sir, I am a Colour Sergeant"
"Well if you were in the RAF, you'd be a Flight Sergeant"
"No Sir, if I were in the RAF I'd be an Air Marshal"
Or some such. Some versions have the services swapped around.