You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I am Barbara Wright. I want to book a flight ticket to attend my nephew birthday in Washington, so please help me in booking a flight ticket.

ASSISTANT: Sure, I would be happy to help you. Can you please provide your take off and landing airport codes?

USER: My source is Houston, TX - HOU and destination code is DC - IAD.

ASSISTANT:  Do you prefer any halt in between your journey?

USER: Yes, I need a halt in between my journey.

ASSISTANT: What are your planned trip dates?

USER: I would like to fly on 03/19 and return on 03/21.

ASSISTANT: Ok, please wait a moment, let me search a flight for you.

USER: Sure.

ASSISTANT:  Thanks for your precious time. We found AA airline fare of 200. Shall I proceed for booking with single stop over flight?

USER: You can proceed to booking.

ASSISTANT: Your ticket has been confirmed with airline number 1014.

USER: Thank you.

ASSISTANT: Thank you for reaching us.