Interpersonal communication is defined as using messages between at least two people to generate shared meaning in a situation that allows for mutual speaking and listening. It includes interactions with strangers, acquaintances, and close friends and family. Interpersonal relationships involve at least two interdependent people who use consistent interaction patterns over an extended time. They are important because they fulfill our basic needs for inclusion, affection, and control according to William Schutz. Our needs can also be met in complementary relationships where each person supplies something the other lacks, or symmetrical relationships with highly similar participants.