You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I render you today?

USER: I am William Wilson.

ASSISTANT: Ok.

USER: Can you help me in booking a flight ticket from NC - CLT to CA - LAX?

ASSISTANT: Sure, could I have your travel dates?

USER: I want to fly on 03/19 and return on 03/21.

ASSISTANT: Do you have any specifications?

USER: I need a direct flight.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

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

USER: Not an issue. Thank you.

ASSISTANT: Thank you for choosing us.