  Dialogue systems capable of social influence such as persuasion, negotiation,
and therapy, are essential for extending the use of technology to numerous
realistic scenarios. However, existing research primarily focuses on either
task-oriented or open-domain scenarios, a categorization that has been
inadequate for capturing influence skills systematically. There exists no
formal definition or category for dialogue systems with these skills and
data-driven efforts in this direction are highly limited. In this work, we
formally define and introduce the category of social influence dialogue systems
that influence users' cognitive and emotional responses, leading to changes in
thoughts, opinions, and behaviors through natural conversations. We present a
survey of various tasks, datasets, and methods, compiling the progress across
seven diverse domains. We discuss the commonalities and differences between the
examined systems, identify limitations, and recommend future directions. This
study serves as a comprehensive reference for social influence dialogue systems
to inspire more dedicated research and discussion in this emerging area.
