Unable to find Cancel Contact’s Booking Flow

I’m currently working on the "Add a Flow as an Agent Action" challenge, but I’ve run into a blocker: the required flow (Cancel Contact’s Booking) is not available in my org's Flows.

Here is what I’ve done and checked so far:

• Prerequisites: All previous units and hands-on challenges were completed successfully and verified.
• Org Setup: I initially used my assigned Special Developer Edition org, and when that failed, I spun up a brand new Agentforce-enabled Developer org. The flow is still missing in the new org as well.
• Manual Flow Creation: I attempted to build the flow manually in Flow Builder, but I don't have the required input/output parameter specs (like Booking_ID, Error_Message_Output, and Updated_Booking_Record) to configure it correctly for the agent.

Has anyone else encountered this missing flow asset or figured out a workaround/manual setup for the flow parameters? Any tips or insights would be greatly appreciated