Hellos and goodbyes are part of our family's rituals of connection. They say "You are important to me." Each family has their own unique rituals that are important to them. If we are unsure of what rituals we want for our family, we can make some up! Here's a great resource to help us to do that: the rituals of connection card deck in the Gottman Card Decks app.
Instructions (from the app): "Select a card and discuss whether you would like to incorporate the ritual in your relationship, and if so, exactly how it should go, who should do what and when, and how it should end. Be sure to talk about if and why this is important to you, and how this ritual was handled (or mishandled) in your family or in previous relationships."