You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Will you please help me to book a flight from ORD to reach DCA?

ASSISTANT: Sure, On what dates do you want to travel?

USER: My planned dates are on Apr 25th to 27th.

ASSISTANT: Ok, May I know your name please?

USER: Sure, James Turner is my name.

ASSISTANT: Ok, Do you need any stopover?

USER: I prefer a single connected flight.

ASSISTANT: Is there any specifications for your journey?

USER: No.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry to tell you that, we did not find any flights running to that location due to abnormal weather conditions.

USER: No worries, thank you.

ASSISTANT: Thank you for reaching our service.