"Yeah, it was nice."
"She looked beautiful."
"The dress was wonderful."
That's it! From there, the conversation steered onto the topic of another wedding guest and how she wasn't as mean as she usually is.
The idea of backwards-planning a wedding makes a lot of sense. These are very helpful guiding question: "What do I want to say about my wedding when I look back at the pictures?" and "What do I want my guests to say when they tell other people about my wedding?"