6. The method of claim 5 , wherein the determining the final dialog turn depending on the information on whether the user speech is input and the selected one dialog turn information comprises: determining whether the user speech is input; if it is determined that the user speech has been input, controlling the spoken dialog system so as to stop speaking; and if it is determined that the user speech has not been input, controlling the spoken dialog system so as to one of stop, keep, and commence speaking determined based on the selected one dialog turn information.
6. The method of claim 5 , wherein the determining the final dialog turn depending on the information on whether the user speech is input and the selected one dialog turn information comprises: determining whether the user speech is input; if it is determined that the user speech has been input, controlling the spoken dialog system so as to stop speaking; and if it is determined that the user speech has not been input, controlling the spoken dialog system so as to one of stop, keep, and commence speaking determined based on the selected one dialog turn information. 7. The method of claim 6 , wherein the controlling the spoken dialog system so as to stop, keep, or commence speaking based on the selected one dialog turn information comprises: if it is determined that the user speech has not been input, a residual amount of an answer being presently spoken by the spoken dialog system is checked, and if the residual amount of the answer being presently spoken is to be finished within a predetermined period of time and the final dialog turn is determined as the turn-take, the spoken dialog is controlled to continue speaking, otherwise the spoken dialog is controlled to stop speaking.