sir/ma’amA very polite and respectful way for a female speaker to address someone, often used to get their attention. ท่าน is an honorific for a respected person, while คะ is the polite sentence-ending particle used by female speakers.
TH: ท่านคะ ขอถามทางไปสถานีรถไฟหน่อยได้ไหมคะ
EN: Excuse me, sir/ma’am, could I ask for directions to the train station?