You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Can you help me to book a flight ticket from DFW to JFK?

ASSISTANT: Sure, may I know your preferred dates of travel?

USER: I will start on Nov, 10 and return on Nov, 12.

ASSISTANT: Do you need any layover in between your journey?

USER: Yes, I need a break.

ASSISTANT: Any other preferences?

USER: No, thanks.

ASSISTANT: May I know your name?

USER: Elizabeth Baker here.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there were no flights found on your route.

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

ASSISTANT: Thank you for opting us.