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": "user_aliases", "description": "Gets a list of user aliases and the timestamps when they were changed.", "parameters": {"is_id": {"description": "The Steam ID of the user for whom the aliases are retrieved.", "type": "str", "default": "sindex"}}}]
Fetch the alias and timestamp data for Steam IDs '76561198050892829' and '76561198059928360'.
user
assistant
[{"name": "user_aliases", "arguments": {"is_id": "76561198050892829"}}, {"name": "user_aliases", "arguments": {"is_id": "76561198059928360"}}]