Function: cancel_order
This tool belongs to the trading system, which allows users to trade stocks, manage their account, and view stock information. Tool description: Cancel an order.
Parameters: order_id: type: integer
description: ID of the order to cancel. 
Required parameters: order_id
Response: order_id: type: integer
description: ID of the cancelled order.
status: type: string
description: New status of the order after cancellation attempt.