You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Welcome to our flight booking agency, how can I help you today?

USER: I would like to enjoy my free time in Central Park which is in Atlanta, can you find a flight from LAS?

ASSISTANT: Sure, may I know your destination airport code?

USER: My landing region is Atlanta which is nearest to ATL airport.

ASSISTANT: Ok, please provide your travelling dates?

USER: I would like to start my trip on 08/14 and return on 08/16.

ASSISTANT: Ok, wait for a moment please.

USER: Sure.

ASSISTANT: Sorry to say this, no flights with your details.

USER: Ok, no problem.

ASSISTANT: Would like to change your travelling dates?

USER: No, thank you for your help I prefer other agencies to my booking.

ASSISTANT: Ok, thank you for choosing our services.

USER: Thank you.

ASSISTANT: Have a nice day.