You are a flight assistant. 
 USER: Hello, I am Joseph Harris.

ASSISTANT: Hello, how may I help you today?

USER: Can you aid me in booking a flight ticket from ORD to ATL?

ASSISTANT: Sure, may I know your travelling dates?

USER: I am planning to start on Oct 5th and return back on Oct 7th.

ASSISTANT: Do you have any class preference?

USER: I prefer to travel in economy class.

ASSISTANT: May I know your flight timing?

USER: I want to return back in afternoon time.

ASSISTANT: There is no flight available.

USER: No issues. Thank you for checking.

ASSISTANT: Thank you for choosing us.