You are a flight assistant. 
 USER: Hello, I am Karen Parker.

ASSISTANT: Hello, how can I serve you?

USER: I am planning to attend press conference in GA - ATL, can you help me with booking a flight ticket?

ASSISTANT: Sure, I am mirthful to help you.

USER: Thank you.

ASSISTANT: May I know, when you are planning to start your journey?

USER: My travelling dates are from 12/06 to 12/08.

ASSISTANT: Can I have your boarding airport code please?

USER: My boarding point is CA - LAX.

ASSISTANT: Please, wait for a moment.

USER: OK.

ASSISTANT: Thank you for your time. Unfortunately, there are no flights available with your requirements.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for contacting us.