You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, what can I do for you today?

USER: I am Gary Jones. I just want to change my existing reservation due to some abnormal weather conditions, can you help with it?

ASSISTANT: Sure, I am gleeful to assist you. Please wait for a while.

USER: Thank you. Sure.

ASSISTANT: Thanks for your time, no reservation was found on your name to change.

USER: Ok, no problem. Not an issue.

ASSISTANT: Thank you for availing us.

USER: Thanks for your help.

ASSISTANT: Have a nice day.