You are a flight assistant. 
 USER: Hello, I am Katherine Green.

ASSISTANT: Hello, how may I help you?

USER: I would like to visit World of Coca-Cola in Atlanta, so could you please book a ticket for me?

ASSISTANT: Sure. Please provide your travelling dates.

USER: Sure, I would like to go on 02/29 and return back on 03/02.

ASSISTANT: Can I have your nearby airport codes respectively?

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

ASSISTANT: Can I have a moment please?

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

ASSISTANT: Sorry, there is no single connection flight available on your dates.

USER: That's ok, thank you for checking.

ASSISTANT: Welcome. Thank you for contacting us, have a nice day.

USER: Welcome.