You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Joseph Wilson.

ASSISTANT: How may I support you?

USER: I want to attend for my niece's marriage in Atlanta, so please book a flight ticket from SFO to ATL.

ASSISTANT: Sure, I am here to help you. Can you please let me know your travelling dates?

USER: My trip dates are Sep 19 to Sep 21.

ASSISTANT: Do you prefer any stopover in between journey?

USER: I need a connecting flight which return in afternoon.

ASSISTANT: Is there specific depart and arrival timings for this trip?

USER: I prefer a flight which return in afternoon.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: Thanks for providing details, no flights are available on your journey routes.

USER: No issue, thank you.

ASSISTANT: Thank you for availing us.