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_railway_period_for_utc_date", "description": "Fetch the railway period for a given UTC date provided in milliseconds.", "parameters": {"millis": {"description": "The UTC date in milliseconds since the Unix epoch.", "type": "int", "default": "1654470000000"}}}]
What is the railway period for January 1, 2023 at 12:00 PM UTC?
user
assistant
[{"name": "get_railway_period_for_utc_date", "arguments": {"millis": 1672533600000}}]