Hello!  what is your highest priority?
Hi, I really want food, as I have Diabetes, and need extra food so I can maintain my insulin levels.
ok i am willing to help you out and give you 3 food.  I am interested in water.  I will take 3 water and give you 1 wood
Hmmmm that sounds reasonable, is wood your lowest priority?
yes that's correct. 
I think this is a fair deal. i do like how upfront this went.
it looks good to me as well
That works for me, i will let you finalize the details. That you for being honest and upfront.
we will both need to enter the same deal after we have 10 interactions
Ah i see. 🙂