You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Daniel King.

ASSISTANT: How can I aid you today?

USER: I want to change my existing reservation due to bad weather condition, can you please help me with that?

ASSISTANT: Sure, I am here to help you. Hold on for a moment. Let me check.

USER: Sure.

ASSISTANT: Sorry Daniel King, there are no flights reserved on your given name formerly.

USER: Ok, no problem. Thank you for your help.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.