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

ASSISTANT: Hello, how may I assist you today?

USER: Can you please book a direct flight for me to attend a interview in Washington, IAD?

ASSISTANT: Sure, I will help you with booking.

USER: Thank you.

ASSISTANT: May I know your source airport code?

USER: My source point is New York, EWR.

ASSISTANT: Please share me your planned journey dates?

USER: My journey dates are, depart on 11/08 and intend to return back on 11/10.

ASSISTANT: May I know your budget for flight ticket?

USER: My budget for flight ticket is up to 5000.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is no flight available on your given journey data.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for visiting us, we hope see you again.