You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: Please change my existing reservation due to some issues?

ASSISTANT: Sure, please share your good name?

USER: I am Paul Thompson.

ASSISTANT: Please stand by.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no recent reservation found with the given name.

USER: Ok, not an issue. Thank you for your information.

ASSISTANT: Thank you.