How to become excellent in communication skills ?

Again, this is not realistic. Like most ideologies, taken too literally is a recipe for disaster.

Professional means to the best of one's abilities. It does not mean being Superman.

While I've never been a big fan of the American conceit that the only way to avoid being seen as redundant is to come in from your deathbed, distributing highly-contagious viruses along the way, sometime you may have a touch of the misery (probably because someone else came in off their deathbed), your department is too small to have a spare person with your abilities and training, and you just have to do what you can and not attempt to be a Soviet Super Soldier.

And,, on a more cynical note, far too many jobs don't provide any incentive to be all that professional anyway. For me, professionalism has always been about personal pride, not being expected to supply benefits to someone who doesn't reciprocate.