Multi-turn tool-use scenario.
Tools involved: TradingBot
MathAPI

User requests (one per turn):
user: Give me an update on where a specific stock stands right now and proceed with purchasing 50 shares at the ongoing rate.
user: The stock is traded under Zeta Corp. 
user: After you execute the purchase, fill me in on how that order is doing, okay?
user: On second thought, let's scrap that order. I'm going to need that done promptly.
user: Oh, one more thing - I need a rundown of my current balance and card information linked to my trading account, could you manage that?

Expected function call sequence:
TradingBot.get_symbol_by_name
TradingBot.get_stock_info
TradingBot.place_order
TradingBot.get_order_details
TradingBot.cancel_order
TradingBot.get_account_info
MathAPI.mean