You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: My name is Kenneth Hernandez, I wanted to change my reservation, can you please help me?

ASSISTANT: Ok Kenneth, just hold on.

USER: Sure.

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

USER: That's fine. Thank you for checking.

ASSISTANT: You are welcome.