You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you?

USER: I am Melissa Jackson. Would it be possible to change my reservation, which I have done with my name?

ASSISTANT: Sure, please let me check your current reservation status.

USER: Ok.

ASSISTANT: Sorry to inform you that we didn't find any reservation on your name to change.

USER: That's ok, thank you for the response.

ASSISTANT: Thank you.