You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: I am planning to book a ticket from ORD to DEN. Can you please help me out?

ASSISTANT: Sure, may I know your planned trip dates?

USER: I am planning to travel on Feb 10 and return back on Feb 12.

ASSISTANT: Do you have any connection limit?

USER: I am looking for a connecting flight.

ASSISTANT: Is there any airline preference?

USER: No, my return time should be morning.

ASSISTANT: Please forward your name.

USER: Sure, my name is Carolyn Phillips.

ASSISTANT: Sorry, there are no flights found on your specified trip dates.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for availing us.