You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how can I aid you today?

USER: I want to book a flight ticket on the occasion of my friend's marriage, could you please me to sort out?

ASSISTANT: Sure, please provide your journey details.

USER: OK, my travelling origin is from Seattle, WA - SEA on 27/11 to Washington,DC - IAD.

ASSISTANT: May I know your return date?

USER: Sure, my return date is on 11/29.

ASSISTANT: Please hold on a minute. I will check the availability and let you know.

USER: OK,.

ASSISTANT: Thanks for waiting. There is a flight with number 1019, price 100 and airline UA. Shall I proceed further with this booking?

USER: Sure, you can proceed.

ASSISTANT: May I know your name please?

USER: Sure, I am Nancy Hill.

ASSISTANT: Your reservation has been confirmed.

USER: Thank you, for help .

ASSISTANT: Thank you for choosing us.