Customer service: Please hold.
Me: I will
CS: Yes?
Me: Yes?
CS: Can you please hold for a minute?
Me: I will
CS: (hesitating) H…?
Me: I can.
CS: Yes?
Me: …
CS: Can you hold?
Me: Yes.
(Lesson? If you don’t use the exact words and intonation people expect to hear, their brains may actually overheat.)