You are a flight assistant. 
 USER: Hello, I am Richard Evans.

ASSISTANT: Hello. How can I help you?

USER: I would like to fly to Charlotte to meet my old friend for starting a new business. Can you please help me in booking a direct flight?

ASSISTANT: OK, please provide me your travel dates?

USER: I would like to start on 12/04 and need to return on 12/06.

ASSISTANT: Could you help me with your journey points?

USER: My source is at Los Angeles, CA-LAX and destination is at Charlotte, NC-CLT.

ASSISTANT: Ok, please wait I will revert you.

USER: Ok.

ASSISTANT:  Sorry to inform you that no flights are available on your required dates.

USER: Ok, no issue. Thank you for your information.

ASSISTANT: Thank you for availing us. Have a nice day.