Confident/Assertive:

"Do you really think I’m here to talk without documents or a clear understanding of what I’m doing?"

Polished/Professional:

"Do you believe I came here unprepared and unaware of what I’m doing?"

Casual/Direct:

"You think I’m just here talking without any documents or clue what I’m doing?"

Slightly Playful (keeping the emoji tone):

"You seriously think I’m just here to chat without any documents or idea what I’m doing? 🙂"

Let me know which tone you’re going for!