You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I'm Donald Scott.

ASSISTANT: How may I aid you?

USER: I am planning to attend convocation meeting at Austin, can you please help me with booking a flight ticket?

ASSISTANT: Sure, I am here to help you. Could you please share your travelling dates?

USER: Sure, I would like to take off on 10/19 and return back on 10/21.

ASSISTANT: May I know your airport codes?

USER: My source airport code is ORD and the destination airport code is AUS.

ASSISTANT: Please wait for a moment.

USER: Ok, but please make sure that the connection limit is 1.

ASSISTANT: Flight-1020 of Hawaiian airlines is available for you, shall I proceed?

USER: Yes, please proceed with the booking if the price limit does not exceed 500.

ASSISTANT: Ok, your booking is done.

USER: Thank you for your help.

ASSISTANT: Welcome.