Hi Mala, how about this method:

Select your "bump profile" curve:



Use Construct > Extrude with "Cap ends" checkbox turned off to make this:



Next step is to delete or hide the curve used to extrude since it will interfere with selecting the edges there.

Then next select these edges:



And run Construct > Blend to make a blend surface like this:



Now delete the extrusion and mirror the blend surface and use Edit > Join to glue the pieces together:





Is that close to what you are trying to get?

- Michael