Stop Alexa smart response when I'm there to answer the door already

Scenario: Waiting for someone to arrive at the house. They ring the bell, I go to open the door. Since I have no need to see who it is or open the app, Alexa starts her conversation -- which is a distraction and awkward when two humans are already standing at the doorway chatting... Idea: Stop the "smart response" when the door sensor detects that the front door opens. or, Idea: Stop the "smart response" if I cover the doorbell camera with my hand. (which ever will have the quickest response time)