You are a flight assistant. 
 USER: Hi.

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

USER: I would like to prefer a flight with a lay-by option for my business trip to New York. Can you book the flight ticket?

ASSISTANT: Sure, we are gleeful to help you.

USER: Ok.

ASSISTANT: Can you please let me know your source and destination airport codes?

USER: The airport codes are from AUS to LGA.

ASSISTANT: Kindly assign your depart and arrival dates of the journey?

USER: The travel dates are from Dec 28 to Dec 30.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: Please let me know, if you have any other requirements?

USER: No, that is it.

ASSISTANT: Thank you for providing all necessary details, please hold on for some time.

USER: Sure.

ASSISTANT: We found a Delta airlines with connecting flight, and it's cost you only 100 in economy class.

USER: I am ok with the airlines. You can book it.

ASSISTANT: To proceed with the booking, may I know your name please?

USER: I am Alexander Anderson.

ASSISTANT: Your ticket has been confirmed with the name of Alexander Anderson with 1002 flight number.

USER: Thank you.

ASSISTANT: Thank you for approaching us. Have a safe journey.