Confirmation box for a link

Hello,

a blade form shows to the user the following link

  <a role="button"  class="btn btn-primary btn-sm " href="{{ route('pdf') }}">Download Application form</a> 

This link routes the user to a controller, which downloads a pdf file.

I would like to ask for confirmation with a dialog box: ok, cancel and a message, but I do not manage to achieve this with the given link. Is there a way to achieve this with a link? I am using also bootstrap

Thank you