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": "get_user_metadata", "description": "Fetches metadata for a specified user from the Waifu API.", "parameters": {"user_id": {"description": "The unique identifier of the user whose metadata is to be fetched.", "type": "str", "default": "sample_user_id"}}}]
I'm not sure about my user ID. I think it might be 'user123' or 'user456'. Can you check both?
user
assistant
[{"name": "get_user_metadata", "arguments": {"user_id": "user123"}}, {"name": "get_user_metadata", "arguments": {"user_id": "user456"}}]