You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you aid me in booking a flight ticket from AUS to EWR?

ASSISTANT: Sure, I am here to help you in booking. Can you please share your travel dates?

USER: Sure, I would like to go on Mar 31st and return back on Apr 02nd.

ASSISTANT: Ok, may I know your name?

USER: Myself Gregory Lopez.

ASSISTANT: Do you have any specification?

USER: Ensure it is in the economy class.

ASSISTANT: Sorry, no flights are available on your preferable travel dates.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Welcome.