Interaction history management device, interaction device and interaction history management method

An interaction device comprising:

• a sound collection unit configured to collect ambient sound;
• an audio output unit configured to output sound to environment;
• an interaction control unit configured to accept an input of an operation by audio via the sound collection unit, generate a reply by audio in response to the operation, and output the reply by audio via the audio output unit,
• an interaction history storage unit configured to store information that identifies an audio content of the operation accepted by the interaction control unit and information that identifies an audio content of the reply generated by the interaction control unit,
• an execution unit configured to execute a predetermined process related to the operation accepted by the interaction control unit and, when the process is executed normally, store a unique identifier to the interaction history storage unit as associating with the reply generated by the interaction control unit,
• an external data deletion unit configured to, when accepting an instruction to delete information used in the predetermined process by the execution unit, delete the information, identify the identifier of the predetermined process in which the information to be deleted is used, and delete at least the audio content of the reply associated with the identified identifier from the interaction history storage unit;
• a time measurement unit;
• and
• an external data monitoring unit configured to request information about presence of external data to an external service, wherein
• when the time measurement unit detects passing of a predetermined period of time, the external data monitoring unit checks presence or absence of the information used in the predetermined process by the execution unit and, when the information does not exist, outputs a notification that notifies that the information does not exist.

An interaction history management method for managing an interaction history by using a computer wherein,

• the computer comprising:
• a control unit configured to accept an input of an operation by audio and generate a reply by audio in response to the operation;
• an interaction history storage unit configured to store information that identifies an audio content of the operation accepted by the control unit and information that identifies an audio content of the reply generated by the control unit,
• a time measurement unit;
• and
• an external data monitoring unit configured to request information about presence of external data to an external service, wherein
• when the time measurement unit detects passing of a predetermined period of time, the external data monitoring unit checks presence or absence of the information used in the predetermined process by the execution unit and, when the information does not exist, outputs a notification that notifies that the information does not exist;
• and
• the control unit executes:
• an execution step of executing a predetermined process related to the accepted operation and, when the process is executed normally, storing a unique identifier to the interaction history storage unit as associating with the reply;
• and
• an external data deletion step of, when accepting an instruction to delete information used in the predetermined process in the execution step, deleting the information, identifying the identifier of the predetermined process in which the information to be deleted is used, and deleting at least the audio content of the reply associated with the identified identifier from the interaction history storage unit.