Function: retrieve_invoice
This tool belongs to the travel system, which allows users to book flights, manage credit cards, and view budget information. Tool description: Retrieve the invoice for a booking
Parameters: access_token: type: string
description: The access token obtained from the authenticate
booking_id: type: string
description: The ID of the booking
default: None
insurance_id: type: string
description: The ID of the insurance
default: None
Required parameters: access_token
Response: invoice: type: dict
description: The invoice for the booking
properties: booking_id: type: string
description: The ID of the booking
travel_date: type: string
description: The date of the travel
travel_from: type: string
description: The location the travel is from
travel_to: type: string
description: The location the travel is to
travel_class: type: string
description: The class of the travel
travel_cost: type: float
description: The cost of the travel
transaction_id: type: string
description: The ID of the transaction