You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

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

ASSISTANT: Sure, may I know the travelling dates?

USER: My travel dates are 20 to 22 of July.

ASSISTANT: Do you have any connection limit?

USER: I want a connecting flight.

ASSISTANT:  Are there any other specifications?

USER: No.

ASSISTANT: May I know your name?

USER: I am Brandon Nelson.

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

USER: It's ok, not a problem, thank you.

ASSISTANT: Thank you for opting us.