You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I planned to meet my friend in DFW, can you please help me to book a flight ticket from SFO?

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

USER: I prefer to travel on Oct 18 and Oct 20.

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

USER: Kevin Clark.

ASSISTANT: Let me know your connection limit?

USER: I prefer to travel in a connecting 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: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for choosing us.