You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you today?

USER: Help me in booking a flight from DFW to IAD?

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

USER: I like to travel on Dec 12 to 14.

ASSISTANT: On what name, do I need to reserve your ticket?

USER: I am Edward Hernandez.

ASSISTANT: Let me know your connection limit?

USER: I prefer direct flight.

ASSISTANT: Do you have any other requirements?

USER: No.

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

USER: That's ok, thank you.

ASSISTANT: Thank you for choosing us.