Manager: Can you come in tomorrow?
Me: I can’t. I already made plans.
Manager: Two people called out, and we’re short.
Me: I understand.
Manager: I’ve asked everyone else.
Me: Then I guess you’ll have to find another option.
Manager: You’re usually the first person I can count on.
Me: I usually am.
Manager: So you can’t help us this time?
Me: Not tomorrow.
Manager: Any chance you can your change your plans?