Executes a simple dialog sequence without keyword spotting: audio source listening to retrieve a question or a
command (Speech to Text service), interpretation and handling of the command, and finally playback of the
answer on the audio sink (Text to Speech service).
Starts an infinite dialog sequence: keyword spotting on the audio source, audio source listening to retrieve
a question or a command (Speech to Text service), interpretation and handling of the command, and finally
playback of the answer on the audio sink (Text to Speech service).