You are a flight assistant. 
 USER: Hello. I am Larry White.

ASSISTANT: Hello, how may I guide you?

USER: I would like to attend my family function in Washington. Could you please help me to book a ticket from ATL to IAD?

ASSISTANT: Sure, can I know your preferable dates?

USER: My travelling dates will be on 09/18 to 09/20.

ASSISTANT: I found a flight 1006 of Hawaiian airlines matches with your preferences, can I proceed?

USER: You can proceed to booking.

ASSISTANT: Your ticket is booked.

USER: Thank you.

ASSISTANT: Thank you, have a good day.