You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me in booking a flight ticket from New York, EWR to reach Dallas, DFW?

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

USER: My trip dates are from Dec 18 to Dec 20.

ASSISTANT: May I know your connection limit?

USER:  Usually I prefer direct flight, If it is not there please proceed with single stopover flight.

ASSISTANT: Is there any class preference for you?

USER: I am comfortable with any class.

ASSISTANT: Your good name please.

USER: My name is Barbara Scott.

ASSISTANT: Do you have any other specifications?

USER: No, thanks for asking.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: Ok, that's not a problem.

ASSISTANT: Thank you for reaching us.

USER: Thanks for your information.