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_missing_number", "description": "Finds the missing number in a list of integers from 0 to n.", "parameters": {"nums": {"description": "The list of integers.", "type": "List[int]"}}}, {"name": "merge_dictionaries", "description": "Merges two dictionaries into a single dictionary.", "parameters": {"dict1": {"description": "The first dictionary.", "type": "Dict"}, "dict2": {"description": "The second dictionary.", "type": "Dict"}}}, {"name": "reverse_string", "description": "Reverses the characters in a string.", "parameters": {"text": {"description": "The input string.", "type": "str"}}}, {"name": "word_frequency", "description": "Calculates the frequency of each word in a text.", "parameters": {"text": {"description": "The input text.", "type": "str"}}}]
What is the reverse of the string 'hello world' and how many times does the word 'the' appear in the sentence 'The quick brown fox jumps over the lazy dog'?
user
assistant
[{"name": "reverse_string", "arguments": {"text": "hello world"}}, {"name": "word_frequency", "arguments": {"text": "The quick brown fox jumps over the lazy dog"}}]