You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. In which way I can help you at this moment?

USER: I need to buy a plane ticket from PHL to OAK. Please help me in that.

ASSISTANT: Sure, I will help you with that. Could you please mention your preferable travel dates?

USER: My trip dates are from Aug, 20 to Aug, 22.

ASSISTANT: May I know your name for further process?

USER: Anna Robinson.

ASSISTANT: Do you prefer either an economy or business class?

USER: I am comfortable with any class.

ASSISTANT: Do you need any specific depart and arrival time for this trip?

USER: No.

ASSISTANT: Do you have any another specifications?

USER: I need a single connecting flight.

ASSISTANT: Ok, please hold on a moment.

USER: Ok.

ASSISTANT: Spirit airline flight available with connection limit 1 and fare is 100, shall I confirm this economy class flight?

USER: Please proceed.

ASSISTANT: Your flight ticket is booked successfully, flight number is 1016.

USER: Thank you for booking.

ASSISTANT: You are welcome Anna Robinson.