You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: Please help me to book a flight ticket from MSP to ORD.

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

USER: My travelling dates are from Aug, 23 to Aug, 25.

ASSISTANT: Ok, do you have any specifications?

USER: I need a single connecting flight and I need to depart in the afternoon.

ASSISTANT: Ok, hold on for a moment. Let me check the best available flight for you.

USER: Sure.

ASSISTANT: May I know your name please?

USER: I am Christine Jones.

ASSISTANT: Sorry Christine Jones, there are no flights available on your requested dates.

USER: No problem, thanks for your information.

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