Hi there! How are you?
Great! I'm very excited to go camping, how about you?
I am! Now, I need a lot of firewood because we were planning on burning some earlier (to start cooking meals and such). I also need some extra food in case bugs come and eat some (like last trip, ugh). How about I take 2 firewood, 2 food, and you take 3 water, 1 firewood, and 1 food?
Would you be open to taking 1 less firewood, I would give you 1 food for it. The weather is supposed to be extra chilly and we did not bring warm enough sleeping bags so we need the extra firewood to avoid freezing to death!
No, I would need more water if I were to take that deal.
hmmm I am not willing to give that up. I think I would stick to your original proposal. 
Okay cool. Let's go with my original deal.
Yeah sounds good.