You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Debra Moore here.

ASSISTANT: In which way I can aid you at this moment?

USER: I would like to visit Washington for a business meeting, can you please help me out with booking of a flight ticket to go there?

ASSISTANT: Sure, I am happy to help you in booking flight ticket.

USER: Thank you.

ASSISTANT: Could you please let me know your preferable airport code names for booking flight ticket?

USER: Sure, I will prefer ORD and IAD as my origin and destination airport codes for booking.

ASSISTANT: Can you please mention your travel dates for further process?

USER: Sure, I am planning to move on 10/16 and please book my return ticket on 10/18.

ASSISTANT: Please hold on a moment, I will check flight availability in this route.

USER: Ok, take your time.

ASSISTANT: According to your information, I have found a flight with single stop over in your journey with a minimum fare of 100 is provided by Delta airlines. Shall I confirm this flight ticket for you?

USER: That's fine for me, you can proceed with booking.

ASSISTANT: I have confirmed your flight ticket, flight number is 1022.

USER: Thank you for your help in booking of my ticket.

ASSISTANT: Thank you for choosing us, have a nice day.

USER: Welcome.