You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you help me to change my recent reservation?

ASSISTANT: Sure. Tell me your name please?

USER: Kenneth Turner here.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Sorry there is no flight reservation on your name to change it.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you.