Prep me for a difficult conversation

What to say, what they'll say back, where it goes wrong.

Help me prepare for a hard conversation.

Situation: [WHAT HAPPENED]
Them: [THEIR ROLE AND WHAT THEY CARE ABOUT]
What I want: [THE OUTCOME]
What I'm worried about: [THE FEAR]

Give me:
1. My opening, in two sentences, said out loud.
2. The three most likely ways they respond, and what to say to each.
3. The one thing I should not say.
4. What a good enough outcome looks like if I don't get everything.

Be direct. Don't coach me on being empathetic in general.