You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you now?

USER: I would like to visit Independence Hall at Philadelphia. Can you please book me a flight ticket with fare of 500?

ASSISTANT: Sure. Let me know your journey dates.

USER: My journey dates are 02/07 and 02/09.

ASSISTANT: Ok. May I know your airport codes?

USER: Sure, airport codes are NY - EWR to PA - PHL.

ASSISTANT: Thanks for your details and let me know your name for further process.

USER: Rebecca Wilson is my name.

ASSISTANT: Thanks for your time. We found that there was no flight that matches with your information.

USER: Ok, not a problem.

ASSISTANT: Thanks for opting us.

USER: Thank you for your information.