You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: I need to book a flight ticket from DEN to OAK, Can you please help me for booking?

ASSISTANT: Sure, may I know your planned trip dates?

USER: I would like to travel on 12/06 to return on 12/08.

ASSISTANT: May I know your connection limit?

USER: Yes, I need a connecting flight.

ASSISTANT: Is there any airline preference?

USER: No.

ASSISTANT: Do you have any other specifications other than these?

USER: I don't need any other specifications.

ASSISTANT: May I know your good name to proceed further?

USER: Donald Hill here.

ASSISTANT: Sorry, there are no flights found on your specified routes due to abnormal weather conditions.

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thank you for availing us.