You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: I would like to attend my friend birthday at New York, can you please help me to book a flight ticket from AUS to LGA?

ASSISTANT: Sure, could you please provide your journey dates?

USER: Sure, my trip dates are Oct 07 and Oct 09.

ASSISTANT: Are you looking for any preferred class?

USER: My class preference is economy.

ASSISTANT: Do you have any other specifications to be met?

USER: I would like to travel in normal-cost airline.

ASSISTANT: May I know your name to proceed?

USER: My name is William Brown.

ASSISTANT: Ok, please wait a moment.

USER: Sure, take your own time.

ASSISTANT: Thank you for your valuable time, unfortunately no flights available on that route.

USER: No problem, thank you for checking.

ASSISTANT: Thank you for reaching us.