You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Due to bad weather conditions, I want to change my existing reservation. Can you help me out?

ASSISTANT: Sure, please provide me your name.

USER: Sure, my name is Laura Martinez.

ASSISTANT: There is no reservation active with your name.

USER: That's ok, thank you.

ASSISTANT: Have a great day.