You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how could I serve you?

USER: Michelle Lewis here, I want to change my reservation. Can you please help me with it?

ASSISTANT: Please give me a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that there is no reservation found on your given name.

USER: Not an issue, thank you.

ASSISTANT: Thank you for approaching us.