Update app.py

app.py

@@ -12,16 +12,19 @@ def transfer_to_triage_agent():
     """Call this if the user brings up a topic outside of your purview,
     including escalating to human."""
     print("=> transfer_to_triage_agent")
+    global triage_agent
     set_current_agent(triage_agent)
 
 def transfer_to_sales_agent():
     """Use for anything sales or buying related."""
     print("=> transfer_to_sales_agent")
+    global sales_agent
     set_current_agent(sales_agent)
 
 def transfer_to_issues_repairs_agent():
     """Use for issues, repairs, or refunds."""
     print("=> transfer_to_issues_repairs_agent")
+    global issues_repairs_agent
     set_current_agent(issues_repairs_agent)
 
 #