You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: Can you help me to book a connecting flight?

ASSISTANT: May I know your journey dates?

USER: My travelling dates are Aug 19 and 21.

ASSISTANT: Ok, let me know your airport codes.

USER: My airport codes are EWR to BOS.

ASSISTANT: May I know your depart and return time?

USER: I am fine at any time to travel.

ASSISTANT: Any other specifications to be met?

USER: No.

ASSISTANT: Can I know your name for booking your flight ticket?

USER: My name is Ryan Garcia.

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

USER: No issues, thank you for your time.

ASSISTANT: Welcome Ryan Garcia.