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": "validate_username", "description": "Validates an Instagram username using the Toolbench RapidAPI service.", "parameters": {"username": {"description": "The Instagram username to be validated.", "type": "str", "default": "lelepons"}}}]
Can I use 'travel_enthusiast' as my Instagram username?
user
assistant
[{"name": "validate_username", "arguments": {"username": "travel_enthusiast"}}]