Participant mturk_agent_1's preferences:
value2issue: Low: Firewood
Medium: Food
High: Water
value2reason: Low: I need it to cook and stay warm.  I could also use it to make smores. 
Medium: I would need it to survive and to have energy to do stuff.
High: I need it to stay hydrated, survive, and to cook.  Also to take a shower. 

Participant mturk_agent_2's preferences:
value2issue: Low: Firewood
Medium: Food
High: Water
value2reason: Low: Since it's going to be scorching hot, we don't really need extra warmth.
Medium: We're going to be doing a lot of hiking and climbing out in that heat, and we need to stay well fed so we don't get weak and make mistakes.
High: It's going to be scorching hot and we need all the water we can get to keep cool and hydrated.

Negotiation dialogue:
mturk_agent_2: Hi! I look forward to making a trade with you that's good for us both.

mturk_agent_1: Me too, hopefully we can get together on a deal.

mturk_agent_2: I'm hoping so too. What's most valuable to you?

mturk_agent_1: Water, what about you? 

mturk_agent_2: Food, but I definitely do need some water, too. Can you live with taking 2 waters?

mturk_agent_1: Yes, can you live with two foods? 

mturk_agent_2: I can. How about firewood? I would like 2 if possible.

mturk_agent_1: Well there are only 3.

mturk_agent_2: Of course. Since you're getting more water, I was hoping to get 2 firewood, and you could have the remaining 1. Would that work for you?

mturk_agent_1: Water was my high priority and food was your's, so I think we already split the difference there. 

mturk_agent_2: Okay, so how do you propose splitting the firewood?

mturk_agent_1: Can we split a bundle, in the real world that would be cool.  

mturk_agent_2: I wish we could. I would be down for that. 🙂 That seems the most fair to me. How about you enter the trade deal on your end?

mturk_agent_1: Deal. 

mturk_agent_2: Then let me pass it back to you, and you can enter the trade, then hit submit. I'll be ready.

mturk_agent_1: Submit-Deal

mturk_agent_2: Accept-Deal