Let my significant other or my parents know if I called 911. God forbid it's because I'm in duress (i.e. fire, I'm injured at home, kidnapping, etc), someone else will know I did so immediately.
If
Outgoing phone call to a specific number ends
This Trigger fires every time you place a phone call on your Android device to a number you specify.
Then
Send an SMS
This Action will send an SMS from your Android device to any phone number you specify.
Discover more time saving integrations for Android SMS and Android Phone Call