A few questions, then a conversation.

I'd rather spend our call on your actual situation than on background I could have read beforehand. This takes about four minutes. When you're done you'll go straight to my calendar.

If I'm not the right person for this, I'll tell you on the call, and I'll usually know who is.

You

The business

What's happening

Something usually prompts it. A deal that went sideways, a price you couldn't defend, a partner conversation you've been putting off.
Useful for me to know what's been ruled out.
Be greedy. I'd rather know what you actually want than what you think is realistic.

Logistics

Asking early so neither of us spends time on a conversation that can't work. "Not sure yet" is a real answer.

You'll go straight to my calendar. I read every one of these before we talk.