1. A schedule management system using an interactive robot, the schedule management system comprising the interactive robot audibly communicating with a user, wherein the interactive robot includes: a conversation management unit to determine whether reasoning is performed to obtain schedule information to be provided to the user and to control an operation to audibly provide the schedule information to the user; and a reasoning unit to perform reasoning using information collected by the interactive robot to the obtain the schedule information and to provide the obtained schedule information to the conversation management unit.