Why cant Microsoft use a version of Cortana specifically oriented for aviation according to the sim parameters?

Then she could give instructions for the runway and also freely reply to any question.
Like, "how are you today" 
"Im fine Sir" (instead of your name to keep it formal), adaptations to her logical response as an ATC professional
You could declare an emergency and she gives straight vectors to the nearest airport
Tell you the weather for any place you ask

They could get a copy of the Cortana knowledge base (which they own) and customize her specifically for aviation turning her into an ATC controller, instead of searching the web, she would analise your position and give logical responses according to what you want to do. Pattern for landings, route etc. She could have different voices and gender but the knowledge base is the same.

This topic has been covered previously. They probably will use Speech Recognition at some when they get the sim's performance improved a bit. SR is in the category as VR.