You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Elizabeth Harris.

ASSISTANT: How may I help you Elizabeth Harris?

USER: I heard that there is a famous place called Diverse Musical heritage in Atlanta, please help me in booking my ticket from Los Angeles.

ASSISTANT: If you know your airport code then please let me know.

USER: My nearest source airport codes is LAX and my destination airport code will be ATL.

ASSISTANT: Ok. On which dates you are planning to travel?

USER: I am planning to travel on 03/19 and want to return on 03/21.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry Elizabeth, there is no flight with these location.

USER: It's ok, not an issue, I will plan on some other day.

ASSISTANT: Sure. Thanks to visit us. Have a nice day.

USER: Thank you.