You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: I am planning to visit Seattle for my holidays, can you please help me in booking a flight ticket from DFW?

ASSISTANT: Sure, please share your trip dates.

USER: My trip dates are Apr 20 and Apr 22.

ASSISTANT: Do you need any connection limit?

USER: Yes, I need a connecting flight.

ASSISTANT: Can I know your preferable timings?

USER: I am fine with any other timings.

ASSISTANT: Do you need any other requirements?

USER: No.

ASSISTANT: May I know your name?

USER: Sure, myself Gregory Lopez.

ASSISTANT: There are no flights available on your routes.

USER: That's fine, not an issue. Anyway thank you for checking.

ASSISTANT: Thank you for opting us.