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": "billboard_global_200", "description": "Fetch Billboard Global 200 chart information for a specific date.", "parameters": {"date": {"description": "The date for which to retrieve the chart information, in the format 'YYYY-MM-DD'.", "type": "str", "default": "2020-09-19"}}}]
What were the popular songs globally on December 31, 2019? Also, could you check the chart for the next day?
user
assistant
[{"name": "billboard_global_200", "arguments": {"date": "2019-12-31"}}, {"name": "billboard_global_200", "arguments": {"date": "2020-01-01"}}]