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': 'Events_3_FindEvents', 'description': 'Find cultural events, such as concerts and plays, happening in a specified city on a particular date. Note that the provided function is in Python 3 syntax.', 'parameters': {'type': 'dict', 'required': ['event_type', 'city'], 'properties': {'event_type': {'type': 'string', 'description': 'The category of cultural event to find.', 'enum': ['Music', 'Theater']}, 'city': {'type': 'string', 'description': "The city where the event is being searched for, in the format of 'City, State' (e.g., 'San Francisco, CA'). State names must be abbreviated"}, 'date': {'type': 'string', 'description': "The date of the event, formatted as 'MM/DD/YYYY'. If not specified, the search will include events for all upcoming dates.", 'default': 'dontcare'}}}}, {'name': 'Events_3_BuyEventTickets', 'description': 'Purchase tickets for a specific cultural event on a designated date in a selected city. Note that the provided function is in Python 3 syntax.', 'parameters': {'type': 'dict', 'required': ['event_name', 'number_of_tickets', 'date', 'city'], 'properties': {'event_name': {'type': 'string', 'description': 'The title of the cultural event, such as a concert, play, or exhibition.'}, 'number_of_tickets': {'type': 'integer', 'description': 'The quantity of tickets to be purchased for the event.'}, 'date': {'type': 'string', 'description': "The scheduled date of the event, in the format 'YYYY-MM-DD'."}, 'city': {'type': 'string', 'description': "The city in which the event will take place, formatted as 'City, State' or 'City, Country', such as 'New York, NY' or 'London, UK'."}}}}]


user: Find a music event in Portland that's happening sometime?

Available functions:
[{"name": "Events_3_FindEvents", "description": "Find cultural events, such as concerts and plays, happening in a specified city on a particular date.", "parameters": {"type": "dict", "required": ["event_type", "city"], "properties": {"event_type": {"type": "string", "description": "The category of cultural event to find.", "enum": ["Music", "Theater"]}, "city": {"type": "string", "description": "The city where the event is being searched for, in the format of 'City, State' (e.g., 'San Francisco, CA'). State names must be abbreviated"}, "date": {"type": "string", "description": "The date of the event, formatted as 'MM/DD/YYYY'. If not specified, the search will include events for all upcoming dates.", "default": "dontcare"}}}}, {"name": "Events_3_BuyEventTickets", "description": "Purchase tickets for a specific cultural event on a designated date in a selected city.", "parameters": {"type": "dict", "required": ["event_name", "number_of_tickets", "date", "city"], "properties": {"event_name": {"type": "string", "description": "The title of the cultural event, such as a concert, play, or exhibition."}, "number_of_tickets": {"type": "integer", "description": "The quantity of tickets to be purchased for the event."}, "date": {"type": "string", "description": "The scheduled date of the event, in the format 'YYYY-MM-DD'."}, "city": {"type": "string", "description": "The city in which the event will take place, formatted as 'City, State' or 'City, Country', such as 'New York, NY' or 'London, UK'."}}}}]

Ground-truth function call:
[{"Events_3_FindEvents": {"event_type": ["Music"], "city": ["Portland, OR"], "date": ["", "dontcare"]}}]