17. The system of claim 1 , wherein the instructions further cause the one or more processors to: determine whether the actionable intent node is one of a plurality of predetermined actionable intent nodes; in accordance with the determination that the text representation satisfies the set of rules and that the actionable intent node is one of a plurality of predetermined actionable intent nodes: upon providing the at least one media item from the user-specific corpus of media items, receive audio input; determine whether the audio input contains speech; and in response to determining that the audio input does not contain speech, cease to receive audio input after a predetermined amount of time.
17. The system of claim 1 , wherein the instructions further cause the one or more processors to: determine whether the actionable intent node is one of a plurality of predetermined actionable intent nodes; in accordance with the determination that the text representation satisfies the set of rules and that the actionable intent node is one of a plurality of predetermined actionable intent nodes: upon providing the at least one media item from the user-specific corpus of media items, receive audio input; determine whether the audio input contains speech; and in response to determining that the audio input does not contain speech, cease to receive audio input after a predetermined amount of time. 20. The system of claim 17 , wherein the predetermined amount of time is based on a degree of ambient noise detected in the audio input.