Interaction Strategies for an Affective Conversational Agent by Smith, C, Crook, N, Dobnik, S, Charlton, D, Boye, J, Pulman, S, Santos de la Camara, R, Turunen, M, Benyon, D, Bradley, J, Gamback, B, Hansen, P, Mival, O, Webb, N, Cavazza, M