I don't think so. When you reach a certain age, it's incredibly difficult to remember everything. I work in marketing. I'm making a rough estimate, but I've shook hands with at least 100,000 people (across twenty years of business conferences).

If I made quite the impression on someone to say that, my response is to show delight and apologize! I usually start with, "Ah I'm very sorry! Please, remind me of the time and place?"

Regardless of how they answer, I usually pivot to expanding the conversation. Let's talk about "the now". How are they now? Are they enjoying the event/location? What's new that might be of interest?