Hi there. I can give you 2 waters, but can I have 3 firewood and 3 food? We have a big group and are really going to need these supplies. 
Hey. I definitely agree to the 2 waters! However, the other terms won't really work for me. My friend and I tend to get low blood sugar and while we have other supplies, we would like to have some extra food, so would like at least 1 food from the extra supplies. Also, how about 1 firewood? Would that still leave your group with enough?
We have a really big group of folks who are really fat so we can't part with the food. 
I totally understand where you're coming from. My group is a little smaller, so I think I would be okay with your group taking all 3 food.
Oh that would be very kind of you. Would you be ok with taking 1 firewood possibly? 
Yeah I would be fine with that. I mainly want it so we can have extra to keep away bugs and other animals mainly at night. So, 1 firewood would work for us.
Oh you are a very kind negotiator. 
Thanks! 🙂 You're also being really understanding. Are you still okay with my group taking 2 water?
Yes that is fine with me. Shall we make a deal?
That sounds good to me!