How to start:
Just pick up the two items in the chest in the tutorial basement.

What it does:
It adds a greeting at the top of greeting 0, that overrides all lower greetings.

There is an "enable item" and a "don't enable item".
The don't enable item overrides the enable item.
So if both are carried then the dialogue won't be overridden.
Simply drop the don't enable item to activate the override greeting.

Versions:
1.1: Increased priority of greeting bypass to greeting 0.