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": "fibonacci", "description": "Calculates the nth Fibonacci number.", "parameters": {"n": {"description": "The position of the Fibonacci number.", "type": "int"}}}, {"name": "find_files", "description": "Finds all files with a specific extension in a directory and its subdirectories.", "parameters": {"directory": {"description": "The directory to search in.", "type": "str"}, "extension": {"description": "The file extension to search for.", "type": "str"}}}]
Calculate the 15th Fibonacci number.
user
assistant
[{"name": "fibonacci", "arguments": {"n": 15}}]