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": "listing_details", "description": "Retrieve listing details from Airbnb using the specified listing ID.", "parameters": {"is_id": {"description": "The listing ID to retrieve the details for.", "type": "str", "default": "619966061834034729"}}}, {"name": "asia", "description": "Fetches a list of Asian cities sorted by a specified criterion with pagination support.", "parameters": {"sort": {"description": "The order of sorting. Can be 'asc' for ascending or 'desc' for descending. Default is 'desc'.", "type": "str", "default": "desc"}, "sort_by": {"description": "The criterion to sort the cities by. Examples include 'overall_score', 'internet_speed', 'temperatureC', 'cost_for_family_in_usd', etc. Default is 'overall_score'.", "type": "str", "default": "overall_score"}, "size": {"description": "The number of cities to include per page. Default is '20'.", "type": "str", "default": "20"}, "page": {"description": "The page number to retrieve. Default is '1'.", "type": "str", "default": "1"}}}, {"name": "route_information", "description": "Fetch route information from the BART API using the given command.", "parameters": {"cmd": {"description": "The command to send to the BART API. Possible commands can be found at http://api.bart.gov/docs/overview/examples.aspx.", "type": "str", "default": "routes"}}}]
Retrieve details of an Airbnb listing with ID '123456' and display the top 15 highest-rated Asian cities sorted by cost for a family, starting from page 2. Additionally, fetch the route information for the BART route with ID '104' and display the route details.
user
assistant
[{"name": "listing_details", "arguments": {"is_id": "123456"}}, {"name": "asia", "arguments": {"sort": "desc", "sort_by": "cost_for_family_in_usd", "size": "15", "page": "2"}}, {"name": "route_information", "arguments": {"cmd": "104"}}]