Michael never forgot a face, or in this case a distinctive red Mandalorian helmet, he knew he had the right person the moment he stepped into the bar, but it was best never to reveal your full hand when you didn't need to. Sitting down, he offered Koth a professional nod, according the respect of one bounty hunter to another.
"Can I get drinks or would you rather get straight down to business?" It would probably be the latter going by what Michael knew of him, but the offer was worth making, particularly if it loosened Koth's tongue.