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': 'Payment_1_RequestPayment', 'description': 'Initiates a payment request to a specified receiver with an optional privacy setting. Note that the provided function is in Python 3 syntax.', 'parameters': {'type': 'dict', 'required': ['receiver', 'amount'], 'properties': {'receiver': {'type': 'string', 'description': 'The identifier for the contact or account to receive the payment request, such as an email or account number.'}, 'amount': {'type': 'float', 'description': "The monetary value to be requested, specified in the currency's smallest unit (e.g., cents for USD)."}, 'private_visibility': {'type': 'boolean', 'description': 'Indicates if the transaction should be private (true) or public (false).', 'default': False}}}}, {'name': 'Payment_1_MakePayment', 'description': 'Initiates a payment transaction to send money to a specified receiver using a selected payment method. Note that the provided function is in Python 3 syntax.', 'parameters': {'type': 'dict', 'required': ['payment_method', 'amount', 'receiver'], 'properties': {'payment_method': {'type': 'string', 'description': 'The source of funds for the payment. Choose from the available options.', 'enum': ['app balance', 'debit card', 'credit card']}, 'amount': {'type': 'float', 'description': 'The monetary value to be sent, specified in USD.'}, 'receiver': {'type': 'string', 'description': 'The identifier for the recipient, such as an account number or a contact name.'}, 'private_visibility': {'type': 'boolean', 'description': 'Determines if the transaction will be visible to others or kept private.', 'default': False}}}}]


user: Can you initiate a payment request for $45 to the customer who bought a basket from my online store? Their email is customer@example.com.

Available functions:
[{"name": "Payment_1_RequestPayment", "description": "Initiates a payment request to a specified receiver with an optional privacy setting.", "parameters": {"type": "dict", "required": ["receiver", "amount"], "properties": {"receiver": {"type": "string", "description": "The identifier for the contact or account to receive the payment request, such as an email or account number."}, "amount": {"type": "float", "description": "The monetary value to be requested, specified in the currency's smallest unit (e.g., cents for USD)."}, "private_visibility": {"type": "boolean", "description": "Indicates if the transaction should be private (true) or public (false).", "default": false}}}}, {"name": "Payment_1_MakePayment", "description": "Initiates a payment transaction to send money to a specified receiver using a selected payment method.", "parameters": {"type": "dict", "required": ["payment_method", "amount", "receiver"], "properties": {"payment_method": {"type": "string", "description": "The source of funds for the payment. Choose from the available options.", "enum": ["app balance", "debit card", "credit card"]}, "amount": {"type": "float", "description": "The monetary value to be sent, specified in USD."}, "receiver": {"type": "string", "description": "The identifier for the recipient, such as an account number or a contact name."}, "private_visibility": {"type": "boolean", "description": "Determines if the transaction will be visible to others or kept private.", "default": false}}}}]

Ground-truth function call:
[{"Payment_1_RequestPayment": {"receiver": ["customer@example.com"], "amount": [4500], "private_visibility": ["", false]}}]