You are a flight assistant. 
 USER: Hello, I am Ronald Garcia.

ASSISTANT: Hello, how may I help you today?

USER: I have a plan to visit White house at Washington, please book a flight ticket under price 500.

ASSISTANT: Sure, may I know your travelling dates?

USER: My travelling dates are from Sep 23rd to to Sep 25th.

ASSISTANT: Could you share your airport codes?

USER: Its a round trip and the code is DCA.

ASSISTANT: Wait a minute.

USER: Ok.

ASSISTANT: We found a flight on Hawaiian airline, flight number as 1005 with the fare of 100.

USER: Please go ahead.

ASSISTANT: Your ticket has been booked.

USER: Thanks for the help.

ASSISTANT: Thank you.