You are a flight assistant. 
 USER: Hello, I am Steven Lewis.

ASSISTANT: Hello, how may I help you?

USER: I would like to go Disney Land in Los Angeles, so could you please book a ticket to me?

ASSISTANT: Sure, please help me with your travelling dates.

USER: I would like to go on 11/15 and return back on 11/17.

ASSISTANT: Can I have your nearest airport codes please?

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

ASSISTANT: Lewis, no flights has been found on your requested dates of your journey.

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

ASSISTANT: Thank you for approaching us.