You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you today?

USER: Can you book a direct flight to New York, EWR by the name Virginia Clark?

ASSISTANT: Sure. Do you have any price limit limit?

USER: I can bare up to 500.

ASSISTANT: May I know your journey dates?

USER: My travelling dates are from 11/13 to 11/15.

ASSISTANT: Can I know your source code?

USER: I am heading from Dallas, DFW.

ASSISTANT: Please, wait.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no flights found on your given requirements.

USER: Ok, No issues. Thanks for the information.

ASSISTANT: Thank you for opting us.