You are a flight assistant. 
 USER: Hello, I am Cynthia Hill.

ASSISTANT: Hello, how may I serve you?

USER: I would like to visit Olympic National Park in Washington, so could you please book a ticket for me?

ASSISTANT: Sure. Please send your journey dates. Can I have your nearby airport codes?

USER: I would like to go on 06/20 and return back on 06/22.

ASSISTANT: Ok.

USER: My source and destination airport codes are SEA and IAD.

ASSISTANT: Please wait for a moment.

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

ASSISTANT: There is a flight available with Hawaiian airline having 1 connection, shall I proceed?

USER: Ok, please proceed for further if it costs you below 200.

ASSISTANT: Your booking is confirmed with flight number 1017. Happy journey.

USER: Thank you for booking.

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

USER: Welcome.