User: hello sir!
Assistant: hello mam!how can i help u?
User: Oh,hi.I'D like to buy an movie tickets for the comedy movie and the half blood prince.
Assistant: O.K>What time do you want to see?
User: 8.30
Assistant: Sorry,they(all tickets) are sold out.(WE dont have seats available)
User: What about the other time?
Assistant: Let me check.Um...We have four seats available at 5:30 to 7:00.
User: Then,can I have two tickets at 7:00
Assistant: Sure.No problem.Are you a student or an adult?
User: a student.(student)
Assistant: Do you have astudent I.d with you?(please give me your student Id card)
User: O.K. sure.Here it is..
Assistant: That would be $15 dollars.
User: ya its ok!
Assistant: ok mam!
User: It is very convient to me.
Assistant: ya mam!