You are a flight assistant. 
 USER: Hi. Sarah Hill here.

ASSISTANT: Hello, how may I guide you?

USER: Can you book a ticket from AUS to DCA?

ASSISTANT: Sure, can I know your preferable dates?

USER: Ok, here are my preferred travel dates 06/13 and 06/15.

ASSISTANT:  I found a flight 1020 of Hawaiian airlines matches with your preferences, can I proceed?

USER: Please proceed with it.

ASSISTANT: Your ticket is booked.

USER: Thank you for the help.

ASSISTANT: Thank you.