How to check if "Simple Memory" is empty using an external node?

Hi everyone,

I am building a chatbot using the AI Agent node connected to a simple Memory node.

The Problem: My bot keeps repeating "Hello" or "Welcome" at every single message, even when the conversation is already ongoing. I tried adding instructions in the System Prompt like "If the conversation has started, do not say Hello", but the AI ignores it and greets the user every time.

My Question: Is there a way to inspect or read the content of the simple Memory node using a standard node (like an If node or Code node) before the AI Agent runs?

I want to implement this logic: