8. The method of claim 7 further comprising formulating the additional indirect confirmation question by incorporating at least one additional characteristic of the one or more characteristics from the first machine response in the second machine response.
7. The method of claim 5 further comprising generating a second machine response the user utterance including an additional indirect confirmation question related to the proper name, wherein the second machine response does not repeat the proper name, if the second confidence score is below the defined threshold value.