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": "check_user_exists", "description": "Checks if a user exists on the Waifu service by user ID using the Toolbench RapidAPI key.", "parameters": {"user_id": {"description": "The unique identifier of the user to check.", "type": "str", "default": "sample_user_id"}}}, {"name": "get_character_by_id", "description": "Fetches a Game of Thrones character's information by their ID using the RapidAPI service.", "parameters": {"is_id": {"description": "The ID of the Game of Thrones character to fetch.", "type": "int", "default": "0"}}}]
Check if users with IDs '123456' and '789012' exist on the Waifu service, and fetch the Game of Thrones character information for IDs 1, 2, and 3.
user
assistant
[{"name": "check_user_exists", "arguments": {"user_id": "123456"}}, {"name": "check_user_exists", "arguments": {"user_id": "789012"}}, {"name": "get_character_by_id", "arguments": {"is_id": 1}}, {"name": "get_character_by_id", "arguments": {"is_id": 2}}, {"name": "get_character_by_id", "arguments": {"is_id": 3}}]