Function: get_flight_cost
This tool belongs to the travel system, which allows users to book flights, manage credit cards, and view budget information. Tool description: Get the list of cost of a flight in USD based on location, date, and class
Parameters: travel_from: type: string
description: The 3 letter code of the departing airport
travel_to: type: string
description: The 3 letter code of the arriving airport
travel_date: type: string
description: The date of the travel in the format 'YYYY-MM-DD'
travel_class: type: string
description: The class of the travel. Options are: economy, business, first.
Required parameters: travel_from, travel_to, travel_date, travel_class
Response: travel_cost_list: type: array
description: The list of cost of the travel
items: type: float