Ask HN: Interview about building website without a portfolio

I just got off the phone with someone who needs a website built for their company. On thursday, I am meeting with them in person. The guy on the phone said it was to discuss what needs to be done, talk about how much I charge, and to show him some stuff I've built.

It's that last part that has me worried.I've built a handful of toy websites, a couple of wordpress sites for family/friends, but from his description over the phone, he wants a lot more than that. I don't actually have any evidence that I can get the job done, although I'm quite confident in my abilities.

How would you approach this situation?