Trigger a Workflow when a specific email template is used

Trigger a Workflow when a specific email template is used

Hello,

I would like to trigger a workflow based upon what email template is used to reply to a lead. Is this possible? 

What I'm trying to accomplish is (in pseudocode):

if (Email was sent using Final Attempt Template) {
    if (No response received within 7 days) {
         Close Lead
    }
}