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": "remove_duplicates", "description": "Removes duplicate elements from a list while preserving the order.", "parameters": {"lst": {"description": "The input list.", "type": "List"}}}, {"name": "is_sum_of_cubes", "description": "Checks if a number is the sum of the cubes of its digits.", "parameters": {"num": {"description": "The number to check.", "type": "int"}}}, {"name": "count_vowels", "description": "Counts the number of vowels in a given text.", "parameters": {"text": {"description": "The input text.", "type": "str"}}}]
How many vowels are there in the sentence 'Hello, how are you?'
user
assistant
[{"name": "count_vowels", "arguments": {"text": "Hello, how are you?"}}]