Dialogue 1A: Good morning, Sir. This is(booking office).Can(help)?B: Yes, I’d like to(book,ticket) to Changsha next week.Are there any flightsleft now?A: When(plan, leave)for Changsha?B: On the morning of April the 1st.A: What(prefer),business classoreconomy class ?B: Economy class.A: How many(ticket)?B: Only One.A: Do you want( a round trip ticket, a singleticket)?B:A singleticket.A: Let me look up the time-table for you, Seats(available) on MU3457.B: Ok. I’ll(take).h