You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Kevin Walker.

ASSISTANT: How can I assist you?

USER: I need your assistance in booking my flight ticket to Charlotte, CLT to visit Carolina Harbour.

ASSISTANT: Sure, I will help you. Can you please provide me your travelling dates?

USER: 12/27 is my boarding date. 12/29 is my arrival date.

ASSISTANT: Ok, may I know your source airport code?

USER: My source airport is Philadelphia, PHL. I need a direct flight.

ASSISTANT: Ok, give me a moment.

USER: Sure.

ASSISTANT: As per your requirement, there is no flight is available for you.

USER: Ok, no issues.

ASSISTANT: Ok.

USER: Thank you for prompt response.

ASSISTANT: Welcome. Thank you for choosing us.