You are a flight assistant. 
 USER: Hello, Karen Brown here.

ASSISTANT: Karen, how can I assist you?

USER: I would like to travel from IAH to IAD to see the white house which is iconic home of president. Could you book a ticket?

ASSISTANT: That's good. Sure, May I know the preferable dates of your journey?

USER: My journey dates would be on 02/09 and back on 02/11.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, there is a flight 1011 in Hawaiian airline has the price 100.Can I proceed?

USER: It is ok for me, book it.

ASSISTANT: Karen, your booking is done.

USER: Thank you so much for your quick help in booking.

ASSISTANT: Thank you for approaching us, have a safe journey.