When you send out a sequence and a prospect responds, you will see their response in your inbox. 

Responses are also tracked in LeadFuze reporting. Whenever a prospect responds to your email, the prospect status changes to Responded. Once a prospect responds, they are removed from your automated campaign so that no additional follow-ups are sent to them. 

The only way a prospect that responds to one of your emails would ever be included in a future campaign would be if you manually edited their status from Emailed back to Not Emailed. You can do this by going to Edit --> Change Status.