Need to assign a value for a created parameter based on a value of other parameter

[isl91]

Hello all,
I’m new to use dynamo and watched many tutorials. I need to assign a value for a parameter I created on Revit based on a value of another parameter. I attached a photo to explain. For example I need to assign the value (2.1) for the created parameter (Importance) if the (Structural Material) Parameter shows (Copper).

Thanks

[isl91]

Here is a photo form Revit