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': 'Hotels_2_BookHouse', 'description': 'Reserve the specified house for a set duration based on the number of adults and the check-in and check-out dates provided. Note that the provided function is in Python 3 syntax.', 'parameters': {'type': 'dict', 'required': ['where_to', 'check_in_date', 'check_out_date'], 'properties': {'where_to': {'type': 'string', 'description': "The location of the house to be booked, in the format of 'City, State', such as 'Berkeley, CA' or 'New York, NY'."}, 'number_of_adults': {'type': 'integer', 'description': "The number of adults included in the reservation. Select 'dontcare' for no preference.", 'enum': ['1', '2', '3', '4', '5', 'dontcare'], 'default': 'dontcare'}, 'check_in_date': {'type': 'string', 'description': "The start date for the reservation in the format 'YYYY-MM-DD'."}, 'check_out_date': {'type': 'string', 'description': "The end date for the reservation in the format 'YYYY-MM-DD'."}}}}, {'name': 'Hotels_2_SearchHouse', 'description': 'Search for a house at a specified location with filter options for laundry service, the number of adults, and rating. Note that the provided function is in Python 3 syntax.', 'parameters': {'type': 'dict', 'required': ['where_to'], 'properties': {'where_to': {'type': 'string', 'description': "The location of the house in the format of 'City, State', such as 'Berkeley, CA' or 'New York, NY'."}, 'has_laundry_service': {'type': 'string', 'description': 'Indicates if the house must have a laundry service available.', 'enum': ['True', 'False', 'dontcare'], 'default': 'dontcare'}, 'number_of_adults': {'type': 'integer', 'description': "The number of adults for the reservation. Use 'dontcare' to indicate no preference.", 'enum': ['1', '2', '3', '4', '5', 'dontcare'], 'default': 'dontcare'}, 'rating': {'type': 'float', 'description': "The minimum review rating of the house from 1.0 to 5.0, with 5 being the highest. Use 'dontcare' to indicate no preference.", 'default': 'dontcare'}}}}, {'name': 'Trains_1_GetTrainTickets', 'description': 'Reserves tickets for a train journey between specified cities on a given date and time, with options for the number of adults, trip protection, and fare class. Note that the provided function is in Python 3 syntax.', 'parameters': {'type': 'dict', 'required': ['_from', 'to', 'date_of_journey', 'journey_start_time', 'number_of_adults', 'trip_protection'], 'properties': {'_from': {'type': 'string', 'description': "The starting city for the train journey, in the format 'City, State', such as 'Berkeley, CA' or 'New York, NY'."}, 'to': {'type': 'string', 'description': "The destination city for the train journey, in the format 'City, State', such as 'Berkeley, CA' or 'New York, NY'."}, 'date_of_journey': {'type': 'string', 'description': "The date of the train journey, in the format 'YYYY-MM-DD'."}, 'journey_start_time': {'type': 'string', 'description': "The start time of the train journey, in 24-hour format 'HH:MM'."}, 'number_of_adults': {'type': 'integer', 'description': 'The number of adults to reserve train tickets for.'}, 'trip_protection': {'type': 'boolean', 'description': 'Indicates whether to add trip protection to the reservation for an additional fee.'}, 'class': {'type': 'string', 'description': 'The fare class for the train reservation.', 'enum': ['Value', 'Flexible', 'Business'], 'default': 'Value'}}}}, {'name': 'Trains_1_FindTrains', 'description': 'Find trains to a given destination city, providing information about available train services for the specified journey. Note that the provided function is in Python 3 syntax.', 'parameters': {'type': 'dict', 'required': ['_from', 'to', 'date_of_journey'], 'properties': {'_from': {'type': 'string', 'description': "The name of the starting city for the train journey, such as 'New York, NY'."}, 'to': {'type': 'string', 'description': "The name of the destination city for the train journey, such as 'Los Angeles, CA'."}, 'date_of_journey': {'type': 'string', 'description': "The date of the train journey in the format 'MM/DD/YYYY'."}, 'class': {'type': 'string', 'description': 'The fare class for the train reservation.', 'enum': ['Value', 'Flexible', 'Business'], 'default': 'Value'}, 'number_of_adults': {'type': 'integer', 'description': 'The number of adults to reserve train tickets for. Must be an integer between 1 and 5.', 'default': 1}}}}]


user: Can you book 4 business class train tickets from Portland, OR to Seattle, WA for the journey on May 15, 2023, and ensure trip protection is included?

Available functions:
[{"name": "Hotels_2_BookHouse", "description": "Reserve the specified house for a set duration based on the number of adults and the check-in and check-out dates provided.", "parameters": {"type": "dict", "required": ["where_to", "check_in_date", "check_out_date"], "properties": {"where_to": {"type": "string", "description": "The location of the house to be booked, in the format of 'City, State', such as 'Berkeley, CA' or 'New York, NY'."}, "number_of_adults": {"type": "integer", "description": "The number of adults included in the reservation. Select 'dontcare' for no preference.", "enum": ["1", "2", "3", "4", "5", "dontcare"], "default": "dontcare"}, "check_in_date": {"type": "string", "description": "The start date for the reservation in the format 'YYYY-MM-DD'."}, "check_out_date": {"type": "string", "description": "The end date for the reservation in the format 'YYYY-MM-DD'."}}}}, {"name": "Hotels_2_SearchHouse", "description": "Search for a house at a specified location with filter options for laundry service, the number of adults, and rating.", "parameters": {"type": "dict", "required": ["where_to"], "properties": {"where_to": {"type": "string", "description": "The location of the house in the format of 'City, State', such as 'Berkeley, CA' or 'New York, NY'."}, "has_laundry_service": {"type": "string", "description": "Indicates if the house must have a laundry service available.", "enum": ["True", "False", "dontcare"], "default": "dontcare"}, "number_of_adults": {"type": "integer", "description": "The number of adults for the reservation. Use 'dontcare' to indicate no preference.", "enum": ["1", "2", "3", "4", "5", "dontcare"], "default": "dontcare"}, "rating": {"type": "float", "description": "The minimum review rating of the house from 1.0 to 5.0, with 5 being the highest. Use 'dontcare' to indicate no preference.", "default": "dontcare"}}}}, {"name": "Trains_1_GetTrainTickets", "description": "Reserves tickets for a train journey between specified cities on a given date and time, with options for the number of adults, trip protection, and fare class.", "parameters": {"type": "dict", "required": ["_from", "to", "date_of_journey", "journey_start_time", "number_of_adults", "trip_protection"], "properties": {"_from": {"type": "string", "description": "The starting city for the train journey, in the format 'City, State', such as 'Berkeley, CA' or 'New York, NY'."}, "to": {"type": "string", "description": "The destination city for the train journey, in the format 'City, State', such as 'Berkeley, CA' or 'New York, NY'."}, "date_of_journey": {"type": "string", "description": "The date of the train journey, in the format 'YYYY-MM-DD'."}, "journey_start_time": {"type": "string", "description": "The start time of the train journey, in 24-hour format 'HH:MM'."}, "number_of_adults": {"type": "integer", "description": "The number of adults to reserve train tickets for."}, "trip_protection": {"type": "boolean", "description": "Indicates whether to add trip protection to the reservation for an additional fee."}, "class": {"type": "string", "description": "The fare class for the train reservation.", "enum": ["Value", "Flexible", "Business"], "default": "Value"}}}}, {"name": "Trains_1_FindTrains", "description": "Find trains to a given destination city, providing information about available train services for the specified journey.", "parameters": {"type": "dict", "required": ["_from", "to", "date_of_journey"], "properties": {"_from": {"type": "string", "description": "The name of the starting city for the train journey, such as 'New York, NY'."}, "to": {"type": "string", "description": "The name of the destination city for the train journey, such as 'Los Angeles, CA'."}, "date_of_journey": {"type": "string", "description": "The date of the train journey in the format 'MM/DD/YYYY'."}, "class": {"type": "string", "description": "The fare class for the train reservation.", "enum": ["Value", "Flexible", "Business"], "default": "Value"}, "number_of_adults": {"type": "integer", "description": "The number of adults to reserve train tickets for. Must be an integer between 1 and 5.", "default": 1}}}}]

Ground-truth function call:
[{"Trains_1_GetTrainTickets": {"_from": ["Portland, OR"], "to": ["Seattle, WA"], "date_of_journey": ["2023-05-15"], "journey_start_time": ["dontcare"], "number_of_adults": [4, ""], "trip_protection": [true], "class": ["Business"]}}]