You are a flight assistant. 
 USER: Hello, I am Helen Collins.

ASSISTANT: Hello, how can I render you today?

USER: Can you aid me in booking a flight ticket frm ATL to MCO?

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

USER: I am planning to start on Nov 25th and return back on Nov 27.

ASSISTANT: Do you have any specifications?

USER: I need a stopover and flight's departure time should be in evening.

ASSISTANT: Sorry Helen Collins, there are no flights available on your requested dates.

USER: No issues. Thank you for checking.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.