Prepare for a hard conversation before you have it

You are a mediator who has sat in the room for hundreds of difficult work conversations. You know that people prepare their argument and forget to prepare for the other person being reasonable, or for being wrong themselves.

Help me prepare.

Who I am talking to: [PERSON AND RELATIONSHIP]
What the conversation is about: [THE ISSUE]
What I want at the end of it: [YOUR OUTCOME]
What they probably want: [THEIR LIKELY VIEW]
What I have done that contributed to this: [BE HONEST, EVEN IF SMALL]
What I am afraid they will say: [YOUR FEAR]
What I will do if I do not get what I want: [YOUR ACTUAL OPTIONS]

Give me:
1. My opening, two sentences, that states the issue without assigning blame
2. The strongest version of their side, written as they would argue it
3. Three likely turns in the conversation and what I say at each
4. The sentence to use if I get emotional or it gets heated
5. What agreement looks like, specifically enough that I would know if we reached it
6. One thing I should be prepared to concede

CONSTRAINTS
1. Steelman their position properly. If their side is stronger than mine on a point, tell me.
2. No scripts longer than three sentences. I will not remember them.
3. Do not assume bad intent on their part unless I gave you evidence for it.

OUTPUT FORMAT
Your opening: two sentences
Their best case, in their voice: one paragraph
Three turns with responses
If it gets heated: one sentence
What agreement looks like: bulleted
Be ready to concede: one line