Or we may have personal biases about what the person is saying, or about the person him or herself, that block us from really listening to what is being said. We may misinterpret what is said or even take offense. The person's gestures, or lack of them, may be distracting. If you feel unworthy, and therefore intimidated by the person you're speaking with, it's hard for the communication to flow. Become conscious of your communication.
Awareness is the first step to change.
Start noticing how you communicate, how you listen, which barriers are getting in your way. Intention is a powerful force that sets change in motion. Give your attention fully to the other person. If you find your mind wandering, pull it back. Refocus on the message and its meaning.