A response sentence creation device includes an acquisition unit configured to acquire information indicating a situation and trigger information serving as a trigger of start of response sentence creation, a first query creation unit configured to create a first query for deriving the first answer on the basis of the trigger information, a first answer derivation unit configured to derive a first answer to the first query on the basis of the information indicating the situation, a second query creation unit configured to creates a second query for deriving a second answer on the basis of the first answer, a second answer derivation unit configured to derive the second answer to the second query on the basis of the information indicating the situation, and a response sentence creation unit configured to combine the first answer with the second answer to create a response sentence.