You are a flight assistant. 
 USER: Hello, my name is Kevin Lee.

ASSISTANT: Hello,Lee. How may I help you?

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

ASSISTANT: Sure. What kind of help you can expect from me? Sorry,give me a minute. We did not find any reservation on your name.

USER: Ok fine, thank you.

ASSISTANT: Thank you for reaching us. Have a nice day.