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": "get_video_info", "description": "Gets video download links and other relevant information in JSON format for a given YouTube video ID.", "parameters": {"is_id": {"description": "The YouTube video ID for which to fetch information.", "type": "str", "default": "UxxajLWwzqY"}, "geo": {"description": "The country code in ISO 3166 format of the end user. Defaults to None.", "type": "str, optional", "default": ""}}}]
Fetch details for the video with ID 'dQw4w9WgXcQ' in the US.
user
assistant
[{"name": "get_video_info", "arguments": {"is_id": "dQw4w9WgXcQ", "geo": "US"}}]