"Dialogue" is a song written by Robert Lamm for the group Chicago and recorded for their album Chicago V (1972). On the album the song is over 7 minutes long and is divided in two parts. An edited version was released as a single in October 1972, eventually reaching #24 on the U.S. Billboard Hot 100. A live recording of the full song can be heard in Chicago XXXIV: Live in '75. Part II was included in Greatest Hits, Volume II (1982).