Hi, I'm so excited for my camping trip.
Me too!  I'm a bit nervous about having enough supplies.  
Me too, but we can figure this out together. what do you need?
I'm happy to hear that.  I do have a medical condition that requires me to drink a lot of water, so that if most important to me.
oh ok, that makes a lot of sense, I can give you most or all of my water, no worries.
Great.  What do you need?
I really need a lot of firewood because i'm camping in a damp and cold region and need a source of heat at all times.
Okay.  Why don't you take 2 fire wood, 1 water, and 1 food.  Does that work for you?🙂
Yes, sounds good for me! 
Okay.  Great!