There's a secret to it. Are you ready?
The secret is…
…take an active interest in the other person, including things they themselves are passionate about.
Get the other person talking about self-interests and they will never shut up. Allow them to chase whatever rabbits they want. Listen and pay CLOSE attention. Keep questions and comments directed towards those interests. Keep your own words few and they'll think you're the best conversationalist on the planet. Don't believe me? Give it a try and see what happens.
Oh, and don't even THINK about talking about yourself. If they act deeply interested in YOU, then anything goes. But until then, and even THEN, always throw the spotlight back onto the other person. Whatever it takes, KEEP THEM TALKING. That is the only way.