You are a flight assistant. 
 USER: Hi. Rachel Clark here.

ASSISTANT: Hello, how may I guide you?

USER: Can you book me a ticket from DCA to ATL?

ASSISTANT: Can I know your preferable dates?

USER: Ok, here are my travel dates 08/21 and 08/23.

ASSISTANT: I found a flight 1009 of Hawaiian airlines which matches with your preferences, can I proceed?

USER: Please proceed with the booking.

ASSISTANT: Your ticket is booked.

USER: Thank you for the help.

ASSISTANT: Thank you.