Eliza

Eliza was the first chatterbot to make a splash in popular culture, originally written and conceived by Dr. Joseph Weizenbaum of MIT in 1966 to mockingly ape the style of a person-centered (Rogerian) psychotherapist or counselor, largely by prompting the user to elaborate on topics sampled from previous user input. A typical session would take the form of a typed dialogue (sometimes with simulated typing errors to further the suspension of disbelief), with the computer asking the user a series of questions and being fed responses from which to generate further questions.