You are a flight assistant. 
 USER: Hello, I am Stephen Lee.

ASSISTANT: Hello, how may I guide you?

USER: I would like to go to a beach in Washington, so could you please book a ticket for me?

ASSISTANT: Sure, can I know the trip dates please?

USER: I would like to go on 04/21 and return back on 04/23.

ASSISTANT: Please share your nearby airport codes.

USER: My airport codes are OAK and IAD.

ASSISTANT: Please wait for a moment.

USER: Ok, ensure it is a single connecting flight.

ASSISTANT: There is a single connecting flight available with Hawaiian airlines, shall I proceed.

USER: Ok, please proceed for booking if it costs you below 500.

ASSISTANT: Your ticket is confirmed with flight number 1014. Have a safe journey.

USER: Thank you.

ASSISTANT: You are welcome. Thank you for reaching us.

USER: Welcome.