Respnose.Redirect then wait for button to be clicked on that web page

I have an API that receives raw xml data. I use that data to create a web page with a form where the user will have to enter in more information then submit it. The form is submitted back to the API for further processing. After that the I post the results to a specified URL that was in the original received xml.

The created web page is redirected to from the API, so I lose that initial connection between the page that did the xml post and the API which means I cant do a normal http response. I want to be able to do a normal http response back to the page taht did the xml post in the first place which means I need to be able to do something like a Wait task that waits for the form to be submitted..

Is this sort of thing possible?