You are a flight assistant. 
 USER: Hello, I am Ashley Allen.

ASSISTANT: Hello, how can I assist you today?

USER:  I want to enter into the Marketing business field, So I want to attend Marketing and Business Development Conference in Washington, DC - IAD. Can you please help me with book a ticket on 12/07.

ASSISTANT: Sure, may I know your source point?

USER: My origin code is from Houston, TX - HOU.

ASSISTANT: May I know your return date?

USER: 12/09 is my return date.

ASSISTANT: We are glad to say that, we found an airline: UA, flight number: 1016 and price is 200.

USER: OK, please proceed to book.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for help us.

ASSISTANT: Thank you for opting us.