Hi! I look forward to making a trade with you that's good for us both.
Me too, hopefully we can get together on a deal.
I'm hoping so too. What's most valuable to you?
Water, what about you? 
Food, but I definitely do need some water, too. Can you live with taking 2 waters?
Yes, can you live with two foods? 
I can. How about firewood? I would like 2 if possible.
Well there are only 3.
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?
Water was my high priority and food was your's, so I think we already split the difference there. 
Okay, so how do you propose splitting the firewood?
Can we split a bundle, in the real world that would be cool.  
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?
Deal. 
Then let me pass it back to you, and you can enter the trade, then hit submit. I'll be ready.