system: 
You are an expert in composing functions. You are given a question and a set of possible functions.
Based on the question, you will need to make one or more function/tool calls to achieve the purpose.
If none of the function can be used, point it out. If the given question lacks the parameters required by the function,
also point it out. You should only return the function call in tools call sections.

If you decide to invoke any of the function(s), you MUST put it in the format of [func_name1(params_name1=params_value1, params_name2=params_value2...), func_name2(params)]

You SHOULD NOT include any other text in the response.

Here is a list of functions in JSON format that you can invoke.

[{'name': 'weather.get', 'description': 'Get the current weather conditions, including temperature, wind speed, and precipitation, for a specified city and country. Note that the provided function is in Python 3 syntax.', 'parameters': {'type': 'dict', 'required': ['city', 'country'], 'properties': {'city': {'type': 'string', 'description': "The name of the city for which to retrieve weather information, such as 'San Francisco'."}, 'country': {'type': 'string', 'description': "The ISO country code (2-letter) for the city's country, such as 'US' for the United States."}, 'units': {'type': 'string', 'description': "The unit system used for the weather data. Possible values are 'metric' for Celsius, 'imperial' for Fahrenheit, and 'standard' for Kelvin.", 'enum': ['metric', 'imperial', 'standard'], 'default': 'metric'}, 'include_forecast': {'type': 'boolean', 'description': 'A flag indicating whether to include a weather forecast for the next 5 days. If true, the forecast will be included.', 'default': False}}}}, {'name': 'stock_price.get', 'description': 'Retrieve the latest trade price for a specified stock ticker on a given exchange. Note that the provided function is in Python 3 syntax.', 'parameters': {'type': 'dict', 'required': ['ticker', 'exchange'], 'properties': {'ticker': {'type': 'string', 'description': 'The unique stock ticker symbol used to identify the publicly traded shares of a particular stock on an exchange.'}, 'exchange': {'type': 'string', 'description': "The stock exchange where the ticker is listed, such as 'NYSE' or 'NASDAQ'.", 'enum': ['NYSE', 'NASDAQ', 'LSE', 'TSX']}}}}]


user: Could you retrieve the latest trading price for AAPL on the NASDAQ exchange?

Available functions:
[{"name": "weather.get", "description": "Get the current weather conditions, including temperature, wind speed, and precipitation, for a specified city and country.", "parameters": {"type": "dict", "required": ["city", "country"], "properties": {"city": {"type": "string", "description": "The name of the city for which to retrieve weather information, such as 'San Francisco'."}, "country": {"type": "string", "description": "The ISO country code (2-letter) for the city's country, such as 'US' for the United States."}, "units": {"type": "string", "description": "The unit system used for the weather data. Possible values are 'metric' for Celsius, 'imperial' for Fahrenheit, and 'standard' for Kelvin.", "enum": ["metric", "imperial", "standard"], "default": "metric"}, "include_forecast": {"type": "boolean", "description": "A flag indicating whether to include a weather forecast for the next 5 days. If true, the forecast will be included.", "default": false}}}}, {"name": "stock_price.get", "description": "Retrieve the latest trade price for a specified stock ticker on a given exchange.", "parameters": {"type": "dict", "required": ["ticker", "exchange"], "properties": {"ticker": {"type": "string", "description": "The unique stock ticker symbol used to identify the publicly traded shares of a particular stock on an exchange."}, "exchange": {"type": "string", "description": "The stock exchange where the ticker is listed, such as 'NYSE' or 'NASDAQ'.", "enum": ["NYSE", "NASDAQ", "LSE", "TSX"]}}}}]

Ground-truth function call:
[{"stock_price.get": {"ticker": ["AAPL"], "exchange": ["NASDAQ"]}}]