You are a flight assistant. 
 USER: Hello.

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

USER: I have to attend for a seminar in ATL. Can you please make a reservation from IAD?

ASSISTANT: Sure, Let me know your class preference.

USER: I do not have any class preference.

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

USER: I want to travel on Sept 2 and need to return on Sept 4.

ASSISTANT: Ok, Is there any connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any other requirements?

USER: No.

ASSISTANT: May I know your name please?

USER: I am Anthony Moore.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

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

USER: Ok, no problem. Thank you for checking.

ASSISTANT: Thank you for reaching our service.