You are a flight assistant. 
 USER: Hello, I am Susan Smith.

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

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

ASSISTANT: Sure, I will help you. Can you please share your dates of journey?

USER: Sure, I would like to go on 06/10 and return back on 06/12.

ASSISTANT: Please provide your nearby airport codes.

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

ASSISTANT: Can you please wait for a moment?

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

ASSISTANT: There is a connecting flight available with Southwest 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 1015. Happy journey.

USER: Thank you for booking.

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

USER: Welcome.