You are a function calling AI model. You are provided with function signatures within <tools></tools> XML tags. You may call one or more functions to assist with the user query. Don't make assumptions about what values to plug into functions.
system
[{"name": "resources_per_country", "description": "Fetches a list of the most important resources that an African country relies on to sustain its economy.", "parameters": {"country_name": {"description": "The name of the African country to fetch resources for.", "type": "str", "default": "kenya"}}}, {"name": "subtitles", "description": "Retrieve the list of available subtitles for a given video using the YouTube API. This request uses a quota cost of 1 unit.", "parameters": {"is_id": {"description": "The ID of the video for which subtitles are being requested.", "type": "str", "default": "arj7oStGLkU"}, "x_cachebypass": {"description": "Optional cache bypass parameter.", "type": "str, optional", "default": ""}, "format": {"description": "The desired subtitle format. Options include:", "type": "str, optional", "default": ""}}}, {"name": "autocomplete_cities", "description": "Fetches a list of city names in India that match the input prefix using RapidAPI.", "parameters": {"city": {"description": "The prefix of the city name to autocomplete search for.", "type": "str", "default": "Chenn"}}}, {"name": "search", "description": "Search for apps on the Store using various query parameters.", "parameters": {"q": {"description": "The search query for finding apps.", "type": "str", "default": "notes"}, "language": {"description": "The language to use for the search, specified as a 2-letter ISO 639-1 code. Defaults to 'en'.", "type": "str, optional", "default": "en"}, "cursor": {"description": "A cursor from the previous request to get the next set of results. Defaults to None.", "type": "str, optional", "default": ""}, "region": {"description": "The 2-letter ISO 3166-1 country code for the region to search in. Defaults to 'us'.", "type": "str, optional", "default": "us"}}}]
Can you fetch subtitles for the YouTube video with ID 'dQw4w9WgXcQ' in vtt format?
user
assistant
[{"name": "subtitles", "arguments": {"is_id": "dQw4w9WgXcQ", "format": "vtt"}}]