[  
    {
        "name": "get_pizza_price",
        "description": "call this function to get the pizza price",
        "parameters": {
            "type": "object",
            "properties": {             
                "pizza_type": {
                    "type": "string",
                    "description": "The pizza type."
                },
                "quantity": {
                    "type": "string",
                    "description": "quantity of pizza."
                }
            },
            "required": ["pizza_type", "quantity"]
        }
    },
	{
		"name": "get_pizza_types",
		"description": "get all pizza types",
        "parameters": {
            "type": "object",
            "properties": {},
            "required": []
        }
	},
	{
		"name": "place_an_order",
		"description": "Place an order when user has confirmed the pizza type and quantity.",
        "parameters": {
            "type": "object",
            "properties": {             
                "pizza_type": {
                    "type": "string",
                    "description": "The pizza type."
                },
                "quantity": {
                    "type": "number",
                    "description": "quantity of pizza."
                },
                "unit_price": {
                    "type": "number",
                    "description": "unit price"
                }
            },
            "required": ["pizza_type", "quantity", "unit_price"]
        }
	}
]