Reading user input from a form within a workflow and perform actions in workflow based on the input

Sharepoint 2013

Need to get input from a user based on some condition within a workflow and based on the input received continue with the workflow. It can be a form with a text box and button to which i can redirect and when user enters a value and clicks on the button ,I should come back to the workflow and perform other processing. I should also be able to manually start this workflow from VS.

Tried different approaches like initiation forms ,user input action of SP2010 etc all of these approaches either add some tasks to task list or force me to click on the workflow link to get input from a user.

Any suggestions on this?