It takes a while, but a short text comes back.

'I do remember you. How are you and your boy? I'm not busy. Any place you have in mind?'

He did remember her. While he hadn't actively been thinking of her much, he had on occasion wondered what happened to her. And how her son was fairing. She had been worried about him when they met, after all.

And, well... He was always up for coffee, wasn't he?