For any given sequence, admins should be able to specify what should happen to contacts in that sequence when the sequence ends. We can already unenroll contacts from a sequence with email replies+meetings booked. We should be able to trigger a workflow when the sequence completes. For example, if we add contacts to a meeting request sequence, and they never respond or book a meeting after the sequence completes, we want to automatically move contacts to Nurture - No Response. This is a basic function that practically all enterprise sales engagement tools have.