You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you today?

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

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: I want to travel on Feb 22 and need to return on Feb 24.

ASSISTANT: Do you have any specifications?

USER: I prefer normal-cost airline to travel.

ASSISTANT: May I know your good name?

USER: Myself Jessica Lee.

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

USER: Ok, no problem. Thank you for the information.

ASSISTANT: Thank you for reaching us.