  Artificial Intelligence (AI) is being increasingly deployed in practical
applications. However, there is a major concern whether AI systems will be
trusted by humans. In order to establish trust in AI systems, there is a need
for users to understand the reasoning behind their solutions. Therefore,
systems should be able to explain and justify their output. In this paper, we
propose an argument scheme-based approach to provide explanations in the domain
of AI planning. We present novel argument schemes to create arguments that
explain a plan and its key elements; and a set of critical questions that allow
interaction between the arguments and enable the user to obtain further
information regarding the key elements of the plan. Furthermore, we present a
novel dialogue system using the argument schemes and critical questions for
providing interactive dialectical explanations.
