You are a function calling AI model. You are provided with function signatures within <tools></tools> XML tags. You may call one or more functions to assist with the user query. Don't make assumptions about what values to plug into functions.
system
[{"name": "account_balance", "description": "Fetch the Binance Coin (BNB) balance for a given address on the Binance Smart Chain.", "parameters": {"address": {"description": "The address for which you want to fetch the BNB balance.", "type": "str", "default": "0x0000000000000000000000000000000000000123"}, "network": {"description": "The network to use, either 'mainnet' or 'testnet'. Defaults to None.", "type": "str, optional", "default": ""}}}]
What is the BNB balance for the address '0x1234567890abcdef1234567890abcdef12345678' on the Binance Smart Chain mainnet? Also, check the balance for address '0xaabbccddeeff00112233445566778899aabbccdd' on the testnet.
user
assistant
[{"name": "account_balance", "arguments": {"address": "0x1234567890abcdef1234567890abcdef12345678", "network": "mainnet"}}, {"name": "account_balance", "arguments": {"address": "0xaabbccddeeff00112233445566778899aabbccdd", "network": "testnet"}}]