You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

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

ASSISTANT: Sure, I am here to help you. Can I have your name please?

USER: Thank you. I am Christopher Roberts.

ASSISTANT: May I know your planned journey dates?

USER: I will start on May, 28 and return on May, 30.

ASSISTANT: Let me know your connection limit.

USER: I need a direct flight.

ASSISTANT: Do you have any preferences?

USER: No.

ASSISTANT: Unfortunately, there were no flights running on your route due to abnormal weather conditions.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for availing us.