You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How exactly I can serve you the best today?

USER: Can you please help me to book a flight ticket from OAK to PHL?

ASSISTANT: Sure, Can you please let me know your travelling dates?

USER: My journey dates are May 29 to May 31.

ASSISTANT: Do you prefer any lay by in between journey?

USER: I need a lay by in between my journey.

ASSISTANT: May I know your good name please?

USER: I am Laura Harris.

ASSISTANT: Is there any other specifications regarding your journey?

USER: No.

ASSISTANT: Ok, please wait a moment. let me search a flight for you.

USER: Sure.

ASSISTANT: Thanks for waiting, there are no flights available at this moment matching your particulars.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for your presence. We hope to serve you again.