You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: Brian Robinson here.

ASSISTANT: Ok.

USER: I want to book a flight ticket from DEN to PHL.Can you help me in that?

ASSISTANT: Sure, may I know your trip dates?

USER: My travel dates are Nov 9 to Nov 11.

ASSISTANT: Do you have any specifications?

USER: I need a connecting flight. My depart and return time should be at morning.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

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

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for availing us.