Welcome to Subsim Madgamer78. As far as I know you can't make radio calls other than patrol or contact reports in the vanilla game. Most of what you hear on radio is for effect. There may be mods for two way radio traffic, but I'm not aware of them. [Anybody?]. I do use WB's Mission Orders Lite v1.1, a great mod that cuts down on the amount of radio traffic.
Again, welcome.
