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_anime_by_id", "description": "Retrieve anime details by given ID from the RapidAPI Anime Jokes API.", "parameters": {"is_id": {"description": "The ID of the anime to search for.", "type": "int", "default": "1"}}}, {"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": "community_post_comments", "description": "Retrieves comments for a YouTube community post using the specified cursor token.", "parameters": {"cursor": {"description": "A token used for pagination to fetch the next set of comments from the Community Post Details endpoint.", "type": "str", "default": ""}}}]
Retrieve the next set of comments for a YouTube community post using cursor 'another_page_token' and verify if a user with ID 'user789' exists.
user
assistant
[{"name": "community_post_comments", "arguments": {"cursor": "another_page_token"}}, {"name": "check_user_exists", "arguments": {"user_id": "user789"}}]