You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: Can you please help me to book a flight from DTW to DCA?

ASSISTANT: Sure, may I know the travelling dates?

USER: Sure, I want to travel on Feb 21 and need to return on Feb 23.

ASSISTANT: Do you have any connection limit?

USER: I need a flight with single stopover.

ASSISTANT:  Are there any other specifications?

USER: I prefer economy class to travel.

ASSISTANT: May I know your name?

USER: Myself Richard Garcia.

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

USER: Ok, not an issue. Thank you for the information.

ASSISTANT: Thank you for opting us.