Is Melody having trouble understanding and playing your request? Here are some tips to fix that.
Less Popular or Non-English Names
Melody may not catch artist or song names that are less popular or not in English. You can fix the text by tapping the keyboard icon (bottom right) and typing it in. If you want Melody to learn your correct, ask Melody to "Learn [simple English name]" and type in the correct text. Next time, just say "Play [simple English name]" to play it.
Not on Spotify
Some songs or artists are not on Spotify. You can still play those by asking Melody to use the YouTube app instead. E.g. "Play Blank Space by Taylor Swift in YouTube" or simply "Watch Blank Space by Taylor Swift".