You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I planned to meet my friend in ATL, can you please help me to book a flight ticket from CLT?

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

USER: I prefer to travel on Dec 16 and Dec 18.

ASSISTANT: May I know your airline preference?

USER: I don't have any preferences.

ASSISTANT: Do you need any lay by in your journey?

USER: I prefer to travel in a connecting flight.

ASSISTANT: May I know your name please?

USER: I am David Collins.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: Sorry to say, there are no flights available with your requirements.

USER: Ok, no problem.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your information.