2. The schedule management system according to claim 1 , wherein: if there is at least one schedule to be recommended by the robot, the conversation management unit determines whether the reasoning is performed according to a reasoning weight corresponding to the schedule to be recommended.
2. The schedule management system according to claim 1 , wherein: if there is at least one schedule to be recommended by the robot, the conversation management unit determines whether the reasoning is performed according to a reasoning weight corresponding to the schedule to be recommended. 5. The schedule management system according to claim 2 , wherein the conversation management unit compares the reasoning weights of the schedules with a reference value to divide the schedules into a first group of schedules which do not require reasoning and a second group of schedules which require reasoning, and determines whether reasoning is performed depending on a group of the schedule to be recommended.