Participant mturk_agent_1's preferences:
value2issue: Low: Firewood
Medium: Food
High: Water
value2reason: Low: Another thing for the group activity! What's a camping trip without a campfire? I want to make sure we have plenty of firewood for a nice long chat, maybe with ghost stories. :-)
Medium: I have an activity planned with my group in the evening, after the hike. I want to bring some extra food to share around the campfire. A shared dinner is so friendly and will be a great way to end a day of hiking!
High: I'm going on a hike, and because it will be a hot day, I'd like to make sure I have enough water to drink on the hike, to be comfortable and stay hydrated.

Participant mturk_agent_2's preferences:
value2issue: Low: Water
Medium: Firewood
High: Food
value2reason: Low: We are going to a desolate part of the forest and I don't want to run into a situation where my group gets stranded without water because that would become very dangerous.
Medium: Because we have so many people, we need the fire to last longer so that we can cook enough meals for the amount of people coming on the trip.
High: I have eight people joining me on this camping trip so it's important that we have a large amount of food.

Negotiation dialogue:
mturk_agent_2: Hi there. I'd like 3 packages of food, and 2 packages of firewood. You can have 1 package of firewood and then all of the water.

mturk_agent_1: Hi there! Hm. I was actually thinking that the food and firewood would be more useful to me than the water.

mturk_agent_2: I see. Can you please explain why?

mturk_agent_1: The group I'm camping with is having a fireside gathering in the evening, and I wanted to bring some food to share (doesn't food always taste best outside? 🙂) and also some firewood to contribute. Is there a particular reason you also wanted the food and firewood more?

mturk_agent_2: That's understandable. I'm camping with a group of eight people for a whole week so I want to ensure that we have enough food for everyone. If we have enough firewood, we can cook enough meals to keep everyone fed 🙂

mturk_agent_1: 🙂  Great minds think alike!  Here's a thought: my group is also doing some hiking during the day, and of course, since it's summer, we want to make sure we have enough water. So I could definitely see splitting this in a "some of each" way for all three items.

mturk_agent_2: Yes, that sounds great to me. How about we each take two packages of food, firewood, and water to start. Then, you can either take an extra package of food and I will take the extra firewood and water?

mturk_agent_1: You say "each take two" of each of the three items ... I think you must have meant "each take one"? (There's a total of three of each item.) If so, for the extra, I think "food + wood" goes together better. How about one of us takes the extra water, and the other takes the extra food & wood?

mturk_agent_2: Yes, my mistake. I mean you take 1 food package, 1 firewood package, and 1 water package, and then I will do the same. Then, you can take the food and wood and I will take the extra package of water! 

mturk_agent_1: That works beautifully! I hope you'll have a wonderful camping trip. 🙂

mturk_agent_2: Submit-Deal

mturk_agent_1: Accept-Deal