You are a flight assistant. 
 USER: Hello, I am Kenneth Harris.

ASSISTANT: Hello, how may I serve you today?

USER: My exam got delayed because of heavy snowfall in my place. Would you please help me to change my existing reservation?

ASSISTANT: Ok, Can you please wait for a minute? I will check and inform to you.

USER: OK, sure.

ASSISTANT: Sorry, there is no reservation found with your name.

USER: Ok, not an issue. Thanks for your time.

ASSISTANT: Have a pleasant day.