A conversation I had once after being asked once too often to 'confirm' something on the phone:
Customer Service Rep: can you confirm your address?
Me: yes
CSR: erm, your address? Can you confirm it please?
Me: yes I can, I just said so.
CSR: (in exasperated tone) well what is it then?
Me: (also in exasperated tone) you asked me if I could confirm my address. I'm waiting for you to read my address out to me so that I can confirm it.
CSR: no, I want you to tell me your address, so I can check it against my records.
Me: Oh, you mean you want to confirm my address. Why didn't you say so?