You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Paul Brown here. I want to attend a Seminar in Charlotte. Can you please help me for booking the flight ticket?

ASSISTANT: Sure, I am here to help you. May I know your travelling dates to proceed further?

USER: My travelling dates are 03/24 and 03/26.

ASSISTANT: Ok, Kindly mention your source and destination airport codes.

USER: My airport codes are PHL and CLT.

ASSISTANT: Ok, do you have any class preference?

USER: No.

ASSISTANT: Ok, please standby.

USER: Ok, I will wait.

ASSISTANT: Thank you for waiting, There were no flights found with your given details.

USER: Anyway, thanks for the information.

ASSISTANT: Thank you for reaching us.