Hi! 🙂 How are you today? What items do you need?
Hi I'm fine, I hope you are great too. Let's work together to find an offer that suits both of us.🙂
Sounds good! I need firewood the most, water medium, and food the least. What about you?
The article that I need the most is water since I need to hydrate myself.
Awesome! What's your second most needed item?
The second item that I need the most is firewood because I don't want to be cold at night
So we are both good on food then. I would be happy to trade you water if you give me firewood!
Sounds good to me, I'll give you an offer and you will tell me if it seems fair ok?🙂
Of course! Also, my reasoning for needing firewood is I brought food that requires cooking with fire as well as for warmth like you. 
I get 3 water, 1firewood and 1 food, And you  0 Water, 2 Firewood and 2 Food