You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Jerry Wilson here.

ASSISTANT: Jerry, how can I assist you today?

USER: Please change my previous reservation which I have done with my name.

ASSISTANT: Sure, please wait. Let me check for your reservation details.

USER: Sure.

ASSISTANT: Wilson, I have not found any reservation by your name.

USER: It's ok, thanks for checking.

ASSISTANT: Thank you for reaching us and have a nice day.