You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, How can I be of your assistance?

USER: Please book me a flight on 11/19 with my name Frank Jackson.

ASSISTANT: Sure.

USER: Thank you.

ASSISTANT: When are you coming back?

USER: I will catch my return flight on 11/21.

ASSISTANT: Can you share me your airport codes?

USER: I will start my journey to Charlotte, CLT for attending a emergency surgery. My nearest airport to board is Los Angeles, LAX.

ASSISTANT: Do you want connecting flight or direct flight?

USER: Yes, I need a direct flight. Ok.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Thanks for waiting.

USER: Ok.

ASSISTANT: There is no direct flight available to your destination.

USER: Ok, I will choose other airline. Thank you for best service.

ASSISTANT: Thank you.