You are a flight assistant. 
 USER: Hello, I am Stephanie Evans.

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

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

ASSISTANT: Nice. Please let me know your travelling dates.

USER: I would like to go on 08/24 and return back on 08/26.

ASSISTANT: Can I have your airport codes?

USER: My source and destination airport codes are ATL and DFW.

ASSISTANT: Please wait for a moment.

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

ASSISTANT: There is a flight available with Delta 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 1011. Happy journey.

USER: Thank you.

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

USER: Welcome.