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": "find_duplicate_number", "description": "Finds the duplicate number in a list of integers.", "parameters": {"nums": {"description": "The list of integers.", "type": "List[int]"}}}, {"name": "reverse_string", "description": "Reverses the characters in a string.", "parameters": {"text": {"description": "The input string.", "type": "str"}}}]
What's the reverse of the word 'world'?
user
assistant
[{"name": "reverse_string", "arguments": {"text": "world"}}]