A peripheral information acquisition unit (121) acquires information relating to a first application (13a) running in a terminal, information relating to control of the terminal, or information that can be acquired from a sensor included in the terminal, as peripheral information. The peripheral information acquired by the peripheral information acquisition unit (121) is accumulated in a peripheral information accumulation unit (122). A dialogue interface unit (11) accepts input of information from a user and outputs information to the user. When the peripheral information accumulated in the peripheral information accumulation unit (122) and information input to the dialogue interface unit (11) satisfy a predetermined condition, a scenario control unit (123) causes the dialogue interface unit (11) to output information relating to execution of a second application (14) that is associated with the condition in advance.