You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you at present?

USER: Please help me to book a flight ticket from CLT to DCA.

ASSISTANT: Sure, Let me know your depart and arrival dates.

USER: My journey dates are from Oct, 16 to Oct, 18.

ASSISTANT: Do you need any stopover?

USER: I need a single connecting flight.

ASSISTANT: Ok, Is there any other specifications?

USER: I prefer a business class.

ASSISTANT: Ok, May I know your name please?

USER: Catherine Allen.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: We did not find any flights running to that location due to bad weather conditions.

USER: Thank you for your information.

ASSISTANT: Thank you for reaching our service.