How do I make Siri play my music instead of Pandora on iPhone?

As the title says. I use Siri to play a song I own in my music collection, and Siri only wants to try and use Pandora. Even while driving, which is the primary use case for this. It’s maddening.

removing Pandora and Siri defaults back to Music, but I use Pandora all the time and don’t want to uninstall it.

[Re-Titled by Moderator]