You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Will you help me in booking the flight ticket from SEA to ATL?

ASSISTANT: Sure, may I know your planned travel dates?

USER: My travelling dates are Sept 03 and Sept 05.

ASSISTANT: Is there any class preference for you?

USER: I always prefer economy class.

ASSISTANT: May I know your connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any other specifications?

USER: My return time must be in afternoon.

ASSISTANT: Your good name please.

USER: Myself William Allen.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: Ok, not an issue. Thank you for your help.

ASSISTANT: Thank you for reaching us.