Source : Free On-Line Dictionary of Computing

chatbot
     
         (Or "chatterbot") A {bot} meant to be able to interact
        conversationally with humans.  A chatbot is either an exercise
        in {AI} or merely as an interface, as in an {infobot}.
     
        One of the first and most famous chatterbots (prior to the
        Web) was {Eliza}.
     
        (1999-06-19)