You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I want to book a flight ticket from PHL to EWR, can you please help me in booking?

ASSISTANT: May I know your desired travel dates please?

USER: I planned my journey on Aug 2 and Aug 4 respectively.

ASSISTANT: Can I know your departure and return time please?

USER: I want to return during afternoon.

ASSISTANT: Do you have any other specifications?

USER: Yes, I need a connecting flight and I prefer economy class for my journey.

ASSISTANT: May I know your name please?

USER: Myself Jason Parker.

ASSISTANT: Sorry to say, there is no flight on your desired travel dates.

USER: Not a problem. Thank you for the information.

ASSISTANT: Thank you for opting us.