All phrases

Used to confirm a meeting.

Suggesting collaboration to resolve the conflict.

Prior to that event

Polite request.

It's your decision.

Apologizing for causing offense.

Immediately

Expressing disbelief or strong surprise.

A common greeting.

Polite interruption or apology.

Incidentally.

Agreeing with the other person's statement.

Between two times

Expressing disbelief or questioning.

A casual greeting.

Apology.

Let's deal with the most important things first.

Requesting clarification.

Throughout a period of time

Expressing amazement or wonder.

Greeting used in the morning.

A more formal apology.

Briefly.

Suggesting a pause to calm down and regain perspective.