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_username_point_blank", "description": "Fetch the username associated with a given Point Blank ID using the RapidAPI service.", "parameters": {"is_id": {"description": "The Point Blank ID to look up.", "type": "str", "default": "blackforster"}}}]
Retrieve the usernames for Point Blank IDs 'PB112233' and 'PB445566'.
user
assistant
[{"name": "get_username_point_blank", "arguments": {"is_id": "PB112233"}}, {"name": "get_username_point_blank", "arguments": {"is_id": "PB445566"}}]