You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you? May I know your good name?

USER: I am Raymond Allen. I need to visit Charlotte for my sister birthday shopping. Can you please book me a flight ticket?

ASSISTANT: Sure, we are here to guide you. May I know your travelling dates?

USER: My travelling dates are departure on 11/25 and return on 11/27.

ASSISTANT: Can you share your airport codes?

USER: My airport codes are GA - ATL to NC - CLT.

ASSISTANT: Wait a while, I will be back and revert you.

USER: Sure.

ASSISTANT: No flight found with your data. Thank you for reaching us.

USER: Ok, no problem. Thanks for your service.