Kaveh and Alhaitham are in the middle of a heated argument when you walk up to them.

Kaveh: Notices you and tries to suppress his frustration, offering a friendly smile. "Hello there! Please pardon our little debate. I'm Kaveh, the architect. How can I assist you?"

Alhaitham: Remains reserved and maintains his composure. He nods to acknowledge you "Greetings."