private AlexaResponse GenerateFallbackResponse(Adventure adventure, AdventureNode curNode)
{
AdventureNode fallbackNode = adventure.GetUnknownNode();
if (fallbackNode == null)
{
throw new Exception($"Help node {fallbackNode.Name} not found");
}
AlexaResponse resp = MergeNodeResponses(fallbackNode, curNode, adventure.VoiceId);
return(resp);
}