magento2 – Magento: How to redirect to a phtml page from a controller?

I have a controller and from there I want to redirect to a custom phtml file.

My controller path is app/code/Softadroit/Prescription/Controller/index/Save.php

The phtml file is stored in app/code/Softadroit/Prescription/view/frontend/templates/Success.phtml

How can I redirect to this page from my controller?