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": "exists_exists_ticket_get", "description": "Checks if a ticket exists using the provided RapidAPI key.", "parameters": {"ticket": {"description": "The ticket identifier to be checked.", "type": "str", "default": ""}}}, {"name": "tsv", "description": "Fetches a subset list of a dataset from the specified API along with its metadata.", "parameters": {"dataset": {"description": "The identifier of the dataset to query.", "type": "str", "default": "frim1"}, "format": {"description": "The output format of the data. Defaults to 'tsv'.", "type": "str, optional", "default": "tsv"}}}]
Verify the existence of a ticket 'XYZ789' and retrieve the 'population_statistics' dataset in TSV format.
user
assistant
[{"name": "exists_exists_ticket_get", "arguments": {"ticket": "XYZ789"}}, {"name": "tsv", "arguments": {"dataset": "population_statistics", "format": "tsv"}}]