11. The dialogue system according to claim 10 , wherein the instructions further control the at least one hardware processor to: maintain an associated word bank having associated language data of a certain word configuring the parsed input set; generate the extended input set using the associated language data; and make a request for generation of the extended input set to the input set generator according to the request for the generation of the extended domain.
10. The dialogue system according to claim 9 , wherein, if the parsed input set is not included in the initial domain, the at least one processor makes a request for generation of the extended domain.