When a confirmation response to a user speech is generated, a confirmation response capable of reducing a possibility of the occurrence of misunderstanding by adding additional information acquired from dictionary data or an application execution results is generated. Provided is an information processing device including an audio input unit that receives a user speech, a confirmation response generating unit that generates a confirmation response for requesting confirmation of a speaking user to the user speech, and an audio output unit that outputs the confirmation response generated by the confirmation response generating unit, in which the confirmation response generating unit executes generation of a confirmation response using additional information acquired from at least any of dictionary data and an application execution result. For example, the confirmation response is generated using general knowledge base dictionary data, an application execution result, or information obtained from a captured image, a sensor, or the like.