You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Will you please book me a ticket in direct flight to Boston?

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

USER: I will start on Dec 6 and return on Dec 8.

ASSISTANT: Can you please help me with your source airport code and destination airport code?

USER: I need to reach BOS to attend a party meeting and I will be leaving from CLT.

ASSISTANT: Are you looking for a connecting flight or direct flight?

USER: I have already mentioned above that I need a direct flight.

ASSISTANT: Sorry for the inconvenience, Is there any class preference?

USER: No, I am fine with any class.

ASSISTANT: Could you help me with your name please?

USER: I am Ronald Martin.

ASSISTANT: Ronald Martin, regret to inform that there is no direct flight available on this route for the given dates.

USER: That's alright. Thanks for the information.

ASSISTANT: Thank you for reaching our agency.