Confirmations are a very important aspect of a transactional dialog and are also used extensively by humans in service transactions to ensure that everything has been understood correctly. Since the current speech recognition technology cannot guarantee that the app heard exactly what the user said, the app should confirm what the user wants, especially if the next action could result in unrecoverable consequences. However, confirmations should be used judiciously as they prolong the interaction and can be annoying for the user if they are overused.
The VoiceSearchConfirmation app has the same functionality as VoiceSearch, but it confirms the search criteria before performing the search. Two sample interactions with this app are as follows: