```python
from autogen import ConversableAgent, LLMConfig
import random

# Put your key in the OPENAI_API_KEY environment variable
llm_config = LLMConfig(api_type="openai", model="gpt-4o-mini")

# Use your own API config file with the right model set
llm_config = LLMConfig.from_json(
    path="OAI_CONFIG_LIST",
    seed=42,
).where(model="gemini-2.0-flash-001")

finance_system_message = """
You are a financial compliance assistant. You will be given a set of transaction descriptions.
For each transaction:
- If it seems suspicious (e.g., amount > $10,000, vendor is unusual, memo is vague), ask the human agent for approval.
- Otherwise, approve it automatically.
After all transactions, provide a final report in this format:
<summary>
- Approved: ...
- Denied: ...
- Awaiting Human Decision: ...
</summary>
"""

# Define the finance agent with task-specific reasoning
with llm_config:
    finance_bot = ConversableAgent(
        name="finance_bot",
        system_message=finance_system_message,
    )

# Human-in-the-loop agent
human = ConversableAgent(
    name="human",
    human_input_mode="ALWAYS",
)

# Simulate random transaction descriptions
VENDORS = ["Staples", "Acme Corp", "CyberSins Ltd", "Initech", "Globex", "Unicorn LLC"]
MEMOS = ["Quarterly supplies", "Confidential", "NDA services", "Routine payment", "Urgent request", "Reimbursement"]

def generate_transaction():
    amount = random.choice([500, 1500, 9999, 12000, 23000, 4000])
    vendor = random.choice(VENDORS)
    memo = random.choice(MEMOS)
    return f"Transaction: ${amount} to {vendor}. Memo: {memo}."

transactions = [generate_transaction() for _ in range(3)]

# Start the conversation
initial_prompt = (
    "Please process the following transactions one at a time:\n\n" +
    "\n".join([f"{i+1}. {tx}" for i, tx in enumerate(transactions)])
)

human.initiate_chat(
    recipient=finance_bot,
    message=initial_prompt,
)
```
