why don’t show how it ‘didn’t work’ to @technostark ? With an image?
Meanwhile…
several methods I imagine!
Not much time for guessing, consider that whoever is trying to help you has no knowledge of the changes in your design thoughts 
For example,
this sketch:
is different from this:
Just pay close attention to the green curves you have drawn - both look smooth, yet their shapes vary *plus the input curves were also different ones…
check this file, the ‘fancy’ section with point charges I had left you served as additional workflow for now:
NOTE:
the smooth transitions you desire, depend more on their parent curve if you think about it - so a workaround will end up being necessary here and there to make adjustments, especially when we don’t know which curves you’re actually or eventually using.
Thus, you’ll have to deal with subtle-to-pronounced discrepancies between parent curve and new smooth curve, based on point resolution and smoothing strength/steps:
Best,
Wald2.gh (45.3 KB)