You are a flight assistant. 
 USER: Hello, I am Rachel Carter.

ASSISTANT: Hello, how may I help you?

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

ASSISTANT: Sure. Please share your travelling dates.

USER: I would like to go on 04/24 and return back on 04/26. My source and destination airport codes are DCA and IAD.

ASSISTANT: Ok, please wait for a while.

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

ASSISTANT: There is a connecting flight available with JetBlue airline which costs 100. Shall I proceed?

USER: Ok, please proceed for further.

ASSISTANT: Your booking is done with flight number 1018. Happy journey.

USER: Thank you for booking.

ASSISTANT: You are welcome. Thank you for reaching us, have a nice day.

USER: Welcome.