There are two ways to proceed.
The right way: "We're at 10000 Aurora Ave N, do you need directions?"
The wrong way: "Okay, well what part of town are you coming from? Do you know how to get to 85th? Just go there and then if you're coming from Ballard, turn left onto Aurora, which is also Highway 99, and then go up a ways until you see—"
A customer can easily get driving directions from a street address, but the other way around isn't so useful. Starting out with detailed driving directions can also be construed as insulting if you're talking to someone who has lived in Seattle for a couple years and already knows major streets like Aurora. Just because I'm leaving town doesn't mean I don't already know it.
Also, letting me finish my sentence before making assumptions about my availability would be a good thing. (This particular person saw the note that I was leaving town and wanted to sign my closing paperwork early, and she asked if I was in town right now; I said, "No, I'm in San Francisco currently, but—" and then she interrupted and asked if I was going to come back. Which is of course what I was about to say.)