Barrier to effective communication in this scenario is Information Overload. Individuals have a finite capacity for processing data, so Mr. fahad has in the given scenario. He has more of the information to be processed so the result is information overload. With phone call, text messages from boss, appointment with CEO , and the need to keep all in one field, so he has overloaded information so he tend to ignore, pass over, or forgetting the information which results in less effective communication.