You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: Please reserve me a flight ticket from PHX to OAK.

ASSISTANT: Sure, may I know your planned trip dates?

USER: My preferable journey dates are Sept 09 and Sept 11.

ASSISTANT: Do you have any stop over in between journey?

USER: Yes, I need a stopover in between my journey.

ASSISTANT: Do you have any arrival and depart timings?

USER: I would like to depart in the evening.

ASSISTANT: May I know your good name to proceed further?

USER: My name is Shirley Roberts.

ASSISTANT: Do you have any other specifications?

USER: Yes, I would like to prefer normal cost airline.

ASSISTANT: There are no flights found on your specified travel dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for availing us.