예약하셨습니까? = Do you have a reservation? 성함이 어떻게 되십니까? = What's your name? 여권을 주시겠어요? = Can I see your entry card and passport, please? 명동은 서울의 번화가에요. = Myeong-dong is the main street of Seoul. 우리 커피 한 잔 해요. = Would you like a coffee with me? Note that 셨 is use when you want a little more polite to say. For example: 예약했습니까? and 예약하셨습니까? 예약하셨습니까 is more polite than 예약했습니까. If you mean 이 of 성함이 어떻게 되십니까, it's postposition. 시 is same case with 셨. 예약 하겠습니까? and 예약 하시겠습니까? (Meaning of the example sentence: Do you want to make a reservation?) 예약 하시겠습니다 is more polite than 예약 하겠습니까. 의 means "of". 명동은 서울"의" 번화가예요 = Myeong-dong is the main street "of" Seoul. 한 means "a/an/one". 우리 커피 "한" 잔 해요 = Would you like "a" coffee with me? And about 해요.. I'll think about it a little more. I'll be soon!