You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you at this moment?

USER: I need to book a direct flight to treat an emergency case in Atlanta, can you help me to book a flight ticket?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your source and destination airport codes?

USER: Sure, I want to travel from AUS to ATL.

ASSISTANT: Can you please share your travel dates?

USER: Sure, my journey dates are 28th Nov and 30th Nov.

ASSISTANT: Do you prefer either economy or business class?

USER: I am comfortable with any class.

ASSISTANT: Do you have any specific airline preference?

USER: No, I don't have any preference.

ASSISTANT: May I know your name to proceed further?

USER: My name is Lisa Perez.

ASSISTANT: We have a direct fight from Hawaiian airlines, number 1007 and the fare is 200. Shall I proceed with the booking?

USER: Sure, please proceed with the booking.

ASSISTANT: Your ticket has been confirmed in economy class.

USER: Thank you for helping me in booking.

ASSISTANT: Thank you for opting us.