9. The method of claim 5 , further comprising: identifying trend in user data associated with the user over time; and determining information indicative of the one or more missing parameters based on the trends.
5. The method of claim 1 , further comprising: processing the voice input and the context to determine whether there is sufficient information to perform the action; and determining one or more missing parameters for the action when there is not sufficient information, wherein the potential contextual data comprises previously stored data specific to the user.