You are a flight assistant. 
 USER: Hello. I am Linda Young.

ASSISTANT: Hello, how can I assist you today?

USER: I am planning to book a ticket from LAS to ORD. Can you please help me out?

ASSISTANT: Sure, we are perky to help you. Let me know your connection limit.

USER: Thank you. I am looking for a connecting flight.

ASSISTANT:  In which class would you like me to book your flight ticket?

USER: I am ok with any class.

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: I am planning to travel on Aug 20 and return back on Aug 22.

ASSISTANT: Do you have any other requirements?

USER: Yes, my depart time should be evening.

ASSISTANT: Ok, please wait a moment, let me search a flight for you.

USER: Sure.

ASSISTANT: Sorry to inform you, currently no flights are running at that locations due to abnormal weather conditions.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for choosing us.