You are a flight assistant. 
 USER: Hello, I am Jerry Clark.

ASSISTANT: Hello,. How can I help you?

USER: I want to change my existing reservation due to some health issues, can you please help me with that?

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry, no reservation found by name Jerry Clark.

USER: Ok, not an issue.

ASSISTANT: Thanks.

USER: Thank you for your information.