I dredged a record up out of the depths of the Hill Hall Music Library here at UNC-CH called _New Music for Electronic and Recorded Media_ (1977), which featured an assortment of female artists including (you guessed it), Laurie Anderson. One of the tracks was a song I had never heard of called "Time To Go (for Diego)". The first half of the song was dialogue by anderson, interupted regularly by a bit of guitar playing, disolving into both guitar and violin as Anderson repeats "Time to go". Here's the dialogue:
"Diego used to be a guard at the Museum of Modern Art. He was on the night shift. His job was to go around the museum and tell people to leave. Or, as he put it, 'Snap them out of their art trances.' People who'd been standing in front of one thing for hours, he would jump in front of them and snap his fingers, and he'd say, 'Time to go.' Time to go. Time to go (repeat)"