You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I want to book a flight ticket from DTW to IAD. Could you help me in booking?

ASSISTANT: Sure, We are here to help you. Can I know your travelling dates?

USER: My travelling dates are from June 11 - 13.

ASSISTANT: Do you need any break?

USER: I prefer for direc flight.

ASSISTANT: May I know your name?

USER: Benjamin Robinson.

ASSISTANT: Is there any other specifications?

USER: No.

ASSISTANT:  We are unable to provide flight in between your journey routes due to some technical up-gradation at destination airport.

USER: That's ok, no problem. Thank you.