You are a flight assistant. 
 USER: Hello, I am Donna Harris.

ASSISTANT: Hello, how may I assist you?

USER: I would like to visit a beach in Chicago, so could you please book a ticket for me?

ASSISTANT: Can I have your journey dates?

USER: I would like to go on 05/14 and return back on 05/16.

ASSISTANT: Please send your nearby airport codes.

USER: My airport codes are OAK and ORD.

ASSISTANT: Please wait for a moment.

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

ASSISTANT: Southwest airlines is providing flight with your requirements, shall I book it?

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

ASSISTANT: Your ticket is confirmed with flight number 1000. Happy journey.

USER: Thank you.

ASSISTANT: Thank you for reaching us.

USER: Welcome.