You will probably communicate differently with each of these groups of people. However, effective communication is much the same no matter with whom you are communicating.
Communication is a two-way process. You can talk as much as you want, but if nobody is listening there is no communication. When you first meet others, they will not know how you communicate or anything about you. They will probably expect you to be a reasonable person until you prove otherwise.
To start your relationship off right, and to build understanding with that person, you need to treat them with respect.
