You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: Can you please help me in booking my flight ticket from LAX to ORD?

ASSISTANT: I am happy to help you, may I know your journey dates?

USER: My travelling dates are June 28 and 30.

ASSISTANT: Let me know your connection limit.

USER: I prefer direct flight.

ASSISTANT: Is there any other concern?

USER: I need my depart ticket at evening time.

ASSISTANT: May I know your name?

USER: Myself Jack Walker.

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

USER: Thanks for your information.

ASSISTANT: Welcome Jack Walker.