From the old TA forum (I think, but don't know who)

Phone rings.

Caller:  "I have a quick question"

Me: "Did we do your taxes last year?"

Caller: "No, but it's just a quick question..."

Me:  "OK, let me get your name & address for billing purposes, since I.... hello?  hello?"

**************

Much more polite that some of the other less friendly responses I've used in the past