You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you now?

USER: I would like to book a flight ticket from DCA to AUS, can you please help me to book a flight ticket?

ASSISTANT: Sure, I will help you with that.

USER: Thank you.

ASSISTANT: May I know your travel dates?

USER: Sure, my journey dates are Feb 15 and Feb 17.

ASSISTANT: Do you have any connection limit?

USER: I need a single connection flight.

ASSISTANT: May I know your class preference?

USER: My class preference is business.

ASSISTANT: Do you have any other preferences?

USER: No.

ASSISTANT: Please, provide me your name to proceed.

USER: My name is Laura King.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry, no flights are running on that routes due to abnormal weather conditions.

USER: That's ok, thank you for your information.

ASSISTANT: Thank you for reaching us.