You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: Can you help me to book a flight ticket from AUS to DEN?

ASSISTANT: Sure, can I know your trip dates?

USER: Dec, 21 and Dec, 23 are my travelling dates.

ASSISTANT: Is there any connection limit for you?

USER: I need connecting flight.

ASSISTANT: Are there any other specifications?

USER: I need to depart at morning time.

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

USER: Frank Lee.

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

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for reaching us.