You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I would like to visit Austin for my cousin's wedding. Can you please help me to book a ticket from DC-IAD on 12/21?

ASSISTANT: Sure, may I know your destination and return date?

USER: Sure, my destination is TX-AUS and return 12/23.

ASSISTANT: May I know your name by checking availability for flight ticket?

USER: I am John Jones.

ASSISTANT: Please wait a moment John Jones.

USER: Sure.

ASSISTANT: Your requirement details are matched with one flight ticket. Shall I proceed?

USER: May I know the details of connection and price?

ASSISTANT: Sure, price limit is 200 and connection limit is 1.

USER: OK fine, you can proceed to book ticket.

ASSISTANT: OK. Your flight ticket is booked.

USER: Thanking you very much for helping me.

ASSISTANT: Your welcome, have a safe journey.