You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Will you please help me to find a flight on Sept 16 to Atlanta?

ASSISTANT: Yes, I will help you. Please help me with your source and destination airport codes.

USER: My airport codes are from IAD to ATL.

ASSISTANT: Ok, do you also want me to book your return ticket?

USER: I want to return back on Sept 18.

ASSISTANT: Ok, do you have any preferences?

USER: I need to depart at evening time.

ASSISTANT: May I know your name?

USER: I need a direct flight. My name is Samantha Allen.

ASSISTANT: There is a flight-1006 available in Hawaiian airlines and the ticket fare is 300 only. Is that ok for you?

USER: You can proceed.

ASSISTANT: Your ticket is confirmed successfully with direct flight.

USER: Thank you.

ASSISTANT: You are welcome and thank you for choosing us.