You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Please reserve me a flight ticket from JFK to SFO.

ASSISTANT: Sure, We are here to help you.

USER: Thank you.

ASSISTANT: May I know your name?

USER: I am Justin Evans.

ASSISTANT: Please share me your travelling dates.

USER: My travel dates are July 17 and July 19.

ASSISTANT: Do you need any break?

USER: I prefer connecting flight for this trip.

ASSISTANT: Is there any other specifications?

USER: No, thanks for asking.

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

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.