2001 dodge strates cant keep flud in the overflow

It can't keep any fluid in the overflow reservoir, or is it just overflowing the overflow container.

If it keeps emptying the overflow, you have a leak somewhere.
After it's emptied the overflow, check the radiator if you can.
Allow it to cool for 30 minutes, then open the radiator cap to see if the level is low.
This will tell you if the overflow reservoir is leaking or if you have a more important problem.

If you can't keep fluid in the overflow you either have an external leak, you should see fluid on the ground after stopping, if no fluid is apparent you have an internal engine leak and need a mechanic to determine the cause and repair.