You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: Can you please help me in reserving the ticket from OAK to AUS?

ASSISTANT: May I know your trip dates?

USER: I am planning my trip on Mar 9 and again I will return back on Mar 11.

ASSISTANT: Do you have any connecting flight preferences?

USER: I want to travel in single connection flight.

ASSISTANT: Is there any other concern?

USER: I would like to depart in the afternoon.

ASSISTANT: May I know your name please?

USER: Myself Melissa Johnson.

ASSISTANT: No flights found as per your preferences.

USER: Not a big problem, I will choose alternate way to reach my destination.

ASSISTANT: Thank you for choosing us.

USER: Thank you very much.