Trying to approve demeanor on the floor.

[MichiganOfficial]

You sound like you know what you are doing, so most of all trust yourself. Coaches are just that coaches, so they will try everything that they can think of to sway you their way.
Its ok to talk to them, be calm, be confident, but most of all be short and to the point. This will build trust in you by the coaches. Professionalizm is of the upmost importance talk to the players and coaches but keep it focused on the game. This should help you in building your reputation as a solid official.