1. The waiter has brought the wrong soup.
Waiter: Oh dear, I'm really sorry (really sorry).
Customer: Don't worry about it (worry).
2. The boy hasn't tidied his room.
Boy: I haven't tidied my room (mad). Don't be mad at me, but
Dad: You can do it later. (mind). Never mind.
Ответ: Don't be mad; Never mind.