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': 'get_current_weather', 'description': 'Retrieves the current weather conditions for a specified location in either Celsius or Fahrenheit. Note that the provided function is in Python 3 syntax.', 'parameters': {'type': 'dict', 'required': ['location'], 'properties': {'location': {'type': 'string', 'description': "The location for which to fetch the weather, in the format of 'City, State', such as 'San Francisco, CA' or 'New York, NY'."}, 'unit': {'type': 'string', 'description': 'The unit of temperature for the weather report.', 'enum': ['celsius', 'fahrenheit'], 'default': 'fahrenheit'}}}}, {'name': 'add_postgres_server', 'description': 'Adds or creates a new PostgreSQL server configuration to enable database connections. Note that the provided function is in Python 3 syntax.', 'parameters': {'type': 'dict', 'required': ['nickname'], 'properties': {'nickname': {'type': 'string', 'description': 'A unique nickname for identifying the PostgreSQL server.'}, 'host': {'type': 'string', 'description': "The hostname or IP address of the server, such as 'localhost' or '192.168.1.100'.", 'default': 'localhost'}, 'port': {'type': 'integer', 'description': 'The port number on which the PostgreSQL server is running. Typically, PostgreSQL uses port 5432.', 'default': 5432}, 'database': {'type': 'string', 'description': "The name of the default database to connect to. The standard default is 'postgres'.", 'default': 'postgres'}, 'username': {'type': 'string', 'description': "The username for authentication with the PostgreSQL server. The standard default username is 'postgres'.", 'default': 'postgres'}, 'password': {'type': 'string', 'description': 'The password associated with the username for authentication. This should be kept secure.', 'default': None}}}}, {'name': 'dartfx_help', 'description': 'Provides detailed help, assistance, or guidance on a specific topic within the DartFX system. Note that the provided function is in Python 3 syntax.', 'parameters': {'type': 'dict', 'required': ['topic'], 'properties': {'topic': {'type': 'string', 'description': "The topic for which help is requested. Examples include 'account_setup', 'trading', 'api_usage', etc.", 'enum': ['account_setup', 'trading', 'api_usage', 'security', 'technical_support']}, 'subtopic': {'type': 'string', 'description': 'An optional subtopic for more granular help within the main topic. Leave empty if not applicable.', 'default': ''}, 'include_examples': {'type': 'boolean', 'description': 'A flag to indicate whether to include practical examples in the help response.', 'default': False}}}}]


user: Could you provide assistance on the topic of 'trading' within the DartFX system, and include practical examples?

Available functions:
[{"name": "get_current_weather", "description": "Retrieves the current weather conditions for a specified location in either Celsius or Fahrenheit.", "parameters": {"type": "dict", "required": ["location"], "properties": {"location": {"type": "string", "description": "The location for which to fetch the weather, in the format of 'City, State', such as 'San Francisco, CA' or 'New York, NY'."}, "unit": {"type": "string", "description": "The unit of temperature for the weather report.", "enum": ["celsius", "fahrenheit"], "default": "fahrenheit"}}}}, {"name": "add_postgres_server", "description": "Adds or creates a new PostgreSQL server configuration to enable database connections.", "parameters": {"type": "dict", "required": ["nickname"], "properties": {"nickname": {"type": "string", "description": "A unique nickname for identifying the PostgreSQL server."}, "host": {"type": "string", "description": "The hostname or IP address of the server, such as 'localhost' or '192.168.1.100'.", "default": "localhost"}, "port": {"type": "integer", "description": "The port number on which the PostgreSQL server is running. Typically, PostgreSQL uses port 5432.", "default": 5432}, "database": {"type": "string", "description": "The name of the default database to connect to. The standard default is 'postgres'.", "default": "postgres"}, "username": {"type": "string", "description": "The username for authentication with the PostgreSQL server. The standard default username is 'postgres'.", "default": "postgres"}, "password": {"type": "string", "description": "The password associated with the username for authentication. This should be kept secure.", "default": null}}}}, {"name": "dartfx_help", "description": "Provides detailed help, assistance, or guidance on a specific topic within the DartFX system.", "parameters": {"type": "dict", "required": ["topic"], "properties": {"topic": {"type": "string", "description": "The topic for which help is requested. Examples include 'account_setup', 'trading', 'api_usage', etc.", "enum": ["account_setup", "trading", "api_usage", "security", "technical_support"]}, "subtopic": {"type": "string", "description": "An optional subtopic for more granular help within the main topic. Leave empty if not applicable.", "default": ""}, "include_examples": {"type": "boolean", "description": "A flag to indicate whether to include practical examples in the help response.", "default": false}}}}]

Ground-truth function call:
[{"dartfx_help": {"topic": ["trading"], "subtopic": [""], "include_examples": [true]}}]