5. A method of operating a system comprising: generating with an audio input device first audio data corresponding to utterances spoken by a person; identifying with an audio data processor operatively connected to the audio input device first utterance data in the first audio data; storing with the audio data processor the identified first utterance data in a memory; generating with a user interface device a prompt for the person to speak a registration name in response to the first utterance data corresponding to a predetermined trigger utterance; generating with the audio input device second audio data corresponding to utterances spoken by the person in response to the prompt; identifying with the audio data processor second utterance data in the second audio data corresponding to the registration name; storing with the audio data processor the second utterance data in the memory; and verifying with the audio data processor that the person is a user registered in a registration database stored in the memory in association with the registration name with reference to the first utterance data and the second utterance data.
7. The method of claim 5 further comprising: generating with the user interface device another prompt with the user interface device for the person to speak a predetermined phrase; generating with the audio input device third audio data in response to a third utterance spoken by the person corresponding to the predetermined phrase; identifying with the audio data processor third utterance data in the third audio data; and verifying with the audio data processor that the person is the user registered in the registration database stored in the memory in association with the registration name with reference to the first utterance data, the second utterance data, and the third utterance data.