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": "list_of_countries", "description": "Fetches information about countries where Booking.com offers hotels.", "parameters": {"country": {"description": "The country code for filtering the results. Defaults to None.", "type": "str, optional", "default": ""}}}]
Is it possible to book hotels in Canada using Booking.com?
user
assistant
[{"name": "list_of_countries", "arguments": {"country": "CA"}}]