Just chat! Eliza behaves rather like a psychotherapist and was one of the first chatbots ever written.
ELIZA was written at MIT by Joseph Weizenbaum between 1964 and 1966 BASIC version used as reference. This should be 99% faithful to this version. I removed one bit of text "Do you have any psychological problems?" and added in a token for scratch with some responses.http://cplus.about.com/library/downloads/projects/Eliza/eliza.bas Thanks to appleinventor for reminding me of this program.