A non-transitory computer-readable storage medium storing a program that causes a computer to execute a process, the computer controlling an utterance of a robot, the process including detecting an utterance of a person by using a microphone, obtaining, in response to the detecting, pieces of response information for the utterance of the person based on first information indicating a content of the utterance of the person, obtaining second information relating to at least one of the person and a motion of the person other than the utterance of the person, selecting specified response information among the pieces of response information based on the second information, and transmitting, to the robot, an instruction that causes the robot to execute a response in accordance with the specified response information.