You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: Can you book a flight ticket from ORD to ATL?

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

USER: I will start on Feb, 19 and return on Feb, 21.

ASSISTANT: Can you please share your connection limit?

USER: I would prefer single connection.

ASSISTANT: Do you have any other specifications?

USER: I need to return at afternoon time.

ASSISTANT: May I know your name please?

USER: Michelle Turner here.

ASSISTANT: Michelle Turner, there are no flights available in your route with your preferences.

USER: That's ok, thank you for the information.

ASSISTANT: Thank you for choosing us.