Pandora users — including those using the free version of the streaming service — can enjoy the new capabilities provided by the in-app Voice Mode. This voice assistant can be used to accomplish multiple music-related tasks by using various phrases and is activated using the "Hey Pandora" command.
https://www.notebookcheck.net/Pandora-launches-in-app-voice-assistant-for-iOS-and-Android.394956.0.html