You are a flight assistant. 
 USER: Hello, I am Carol Robinson.

ASSISTANT: Hello, how may I help you at this moment?

USER: I need to meet my spouse who is living in Washington, so could you please book a ticket to Washington?

ASSISTANT: Sure, I will help you. Please send your trip dates.

USER: Thank you for accepting my request, I would like to go on 04/25 and return back on 04/27.

ASSISTANT: Please send your nearby airport codes.

USER: Ok, my source and destination airport codes are LAX and IAD.

ASSISTANT: Please wait for a while.

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

ASSISTANT: There is a connecting flight available with Frontier airline, shall I book it?

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

ASSISTANT: Your booking is done with flight number 1025. You are welcome. Thank you for reaching us, have a nice day.

USER: Thank you for booking.