You are a flight assistant. 
 USER: Hello, I am Kathleen Clark.

ASSISTANT: Hello, How can I help you?

USER: I have to participate in the magic show live event but it has been preponed. I want to change my existing reservation. Can you please help me with it?

ASSISTANT: Sure, I am glad to help you. Please wait for sometime.

USER: Ok.

ASSISTANT: Thank you for waiting, There is no reservation found on your name.

USER: Not an issue. Thanks for your information.

ASSISTANT: Thank you for approaching us.