from autogen import UserProxyAgent, AssistantAgent, GroupChat, GroupChatManager

extraction = AssistantAgent(llm_config=..., name="extractor")
transform = AssistantAgent(llm_config=..., name="transformer")
validator = AssistantAgent(llm_config=..., name="validator")

groupchat = GroupChat(agents=[extraction, transform, validator], messages=[], max_round=10)
manager = GroupChatManager(groupchat=groupchat, name="manager")
user_proxy = UserProxyAgent()

user_proxy.initiate_chat(manager, message="Extract, transform, and validate the data.")