You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

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

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

USER: I would like to travel on Sept 29 and return on Oct 1.

ASSISTANT: On what name, do I need to reserve your ticket?

USER: Nancy Anderson.

ASSISTANT: Let me know your connection limit?

USER: I need a single connection of flight.

ASSISTANT: Do you have any other requirements?

USER: No.

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

USER: No problem, thank you.

ASSISTANT: Thank you for choosing us.