A NoTopic responds to a NO command directed toward the currently conversing NPC. Like a YesTopic it is most useful inside a ConvNode.
As an example, add the following immediately after the YesTopic we've just defined:
++ NoTopic, SuggestedNoTopic
"<q>No, on second thoughts I think we'd better leave it for now.</q>
<q>Very well.</q> she sighs. "