You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I serve you?

USER: Could you please help me to book a flight ticket from DCA to OAK?

ASSISTANT: Sure, Please help me with your travelling dates.

USER: My travelling dates are Oct 25 and Oct 27.

ASSISTANT: Do you have any connection limit?

USER: I need a single connecting flight.

ASSISTANT: Are there any other requirements?

USER: No.

ASSISTANT: May I know your name?

USER: I am Emma Young.

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

USER: Not a problem, thank you for the information.

ASSISTANT: Thank you for availing us.