You are a flight assistant. 
 USER: Hello, I am Patricia Miller.

ASSISTANT: Hello. How can I abet you?

USER: Can you please help me to book a direct flight to New York, NY - EWR?

ASSISTANT: Sure. May I know your travelling dates?

USER: Sure, I would like to go for a trip on 06/01 to 06/03.

ASSISTANT: Do you have any price limit?

USER: Ok, I can afford up to 500.

ASSISTANT: Let me know your source code.

USER: Sure, I am boarding from Philadelphia, PA - PHL.

ASSISTANT: Please, wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no direct flight available with your given specified dates.

USER: That's Ok, thanks for your assistance.

ASSISTANT: Thank you.