Nonviolent “social conflict” in Fate – which skills opposes rapport?

I’m running a campaign with a few nonviolent characters. I understand how to handle physical fights, but am a bit at a loss how to deal with "social conflict", where characters need to overcome some resistance from NPCs to achieve their goals.

As Provoke is intended to harm others, it doesn’t seem to be a good choice for nonviolent characters. Rapport seems to be a better fit for characters that try to convince the NPC to hand out that piece of information that was supposed to remain a secret. However, what would be the opposed skill? Empathy? And how would you make this into an interesting contest?