The phrase "goodbye ritual" refers to a set of traditional actions or habits that people tend to follow when saying goodbye to someone. Full definition
Transitioning a child from a bottle to a sippy cup or a regular cup using goodbye rituals or stories of a «bottle fairy» that took it away might be a way for a parent to honor and respect a child's needs. (abcnews.go.com)
Attempted stall: He stands back up to push me out the door, a maneuver borrowed from our daycare goodbye ritual. (rookiemoms.com)