code: def main():
      co = cohere.Client()
  
      _ = co.chat(
          message="What is the weather like today?",
          model="command-light",
          chat_history=[
              {
                  "user_name": "User",
                  "message": "Hey! How are you doing today?",
              },
              {
                  "user_name": "Bot",
                  "message": "I am doing great! How can I help you?",
              },
          ],
          return_prompt=True,
          return_preamble=True,
      )
  
      _ = co.chat(
          message="How many people live in New York City?",
          model="command-light",
          chat_history=[
              {
                  "user_name": "User",
                  "message": "Hi! How are you doing today?",
              },
              {
                  "user_name": "Bot",
                  "message": "I am doing great! How can I help you?",
              },
          ],
      )
  
label_desc: Use image node_id 1 for calling a global function with example usage: main() without return types