You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I aid you?

USER: Please change my existing reservation which I have done previously with the name Kevin Moore.

ASSISTANT: Sure, give me a minute.

USER: Sure.

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

USER: It's ok, no issues.

ASSISTANT: Thank you for opting us.

USER: Thanks for your service.