Flight of 3 RAF Chinooks approaching Coleman US Army base in Germany, for a refuel. The sqn's monthly-changing formation callsign was, for that month, Corncrake.
Ldr - "Coleman Tower, this is Corncrake Formation."
Twr - " uhhh... is that Corncrisp Information?"
Ldr - "Negative, Corncrake Formation."
Twr - "Roger, Cornflake Information, pass your message."
Ldr - Resignedly - "Roger, three Chinooks to join!"