You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Can you please book me a flight ticket from EWR to BOS?

ASSISTANT: May I know your journey dates?

USER: My planned travel dates are from Dec 1st to Dec 3rd.

ASSISTANT: Any other specifications to be met?

USER: I want a direct flight to travel.

ASSISTANT: May I know your name in the meanwhile?

USER: I am Kevin Carter.

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

USER: Ok, no problem. Thank you.

ASSISTANT: Welcome Kevin Carter.