Use phonebooth like minimal installation in public space during "Nuit Blanche" 2005 in Paris.
The ringing of a phonebooth resounds in the vacuum, without destination. A passer by approaches, intrigued. The cabin lights. The passer by opens the door, enters, takes down the compound, a little constrained. After one moment it hears a voice, somebody says his name, tells his life, an anecdote, is described, its age, its date of birth and other things. Then the message stops, another voice requires: Zho are you?