You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Myself Joseph Gonzalez. I will be making few changes in my previous reservation, can you help me with it?

ASSISTANT: Sure, give me a minute. Let me check the details.

USER: Sure.

ASSISTANT: Sorry Joseph, I couldn't find any reservation on your name.

USER: That's ok, no issues with it. Thanks for checking.

ASSISTANT: You are welcome.