Multi-turn tool-use scenario.
Tools involved: MessageAPI
GorillaFileSystem

User requests (one per turn):
user: Delete all the files in a directory including the directory.
user: The directory has a name of 'Drafts'.

Expected function call sequence:
GorillaFileSystem.echo
GorillaFileSystem.sort
GorillaFileSystem.diff
GorillaFileSystem.cp
GorillaFileSystem.mv
GorillaFileSystem.cat
MessageAPI.send_message