In 1966, Joseph Weizenbaum published ELIZA, a computer program that was meant to replicate human conversation. In its most famous implementation, ELIZA acts as a psychologist, asking the user assorted questions, and then using the responses to formulate further questions.
In 1984, Kogago developed (and ASCII published) Emmy: The Funny Game, released for the Japanese PC8001 computer. It too mimics human conversation, except there’s a visible representation of a girl. The goal is to get her to take her clothes off.
The parser and response is incredibly simplistic, compared to even the earliest implementations of Eliza. If you say things she likes, she’ll react positively. If you say something she doesn’t like or doesn’t understand, she’ll react negatively. Occasionally she’ll take note of the things you say and repeat them back. Sometimes she just sits there and giggles. If you manage to make her happy, eventually her image changes, slowly removing her clothes. If you irritate her, she’ll show you the door and dump you at the command line. If you have a printer, you can have it print out a record of your little chat.