I use on my Alias things like :
You are leaving my airspace and no further ATC available.Resume own navigation, change freq to UNICOM 122.800. Have nice flight.Bye
Or
You are clear to destination $1 via $2 FL $3 is approved Squawk $4
Or
Current information is $1 runway in use $2 qnh $3
Or
Winds from $1 at $2 Runway $3, cleared for takeoff.Report airborne
Or ....
And is to this kind of things that I think a Popup would be nice.