code: def main():
      co = cohere.Client()
  
      response = co.chat(
          message="Hey! How are you doing today?",
          model="command-light",
          return_prompt=True,
          return_preamble=True,
      )
      conv_session_id = response.conversation_id
      _ = co.chat(
          message="What's your plan for the day?",
          conversation_id=conv_session_id,
          model="command-light",
      )
  
label_desc: Use image node_id 1 for calling a global function with example usage: main() without return types