You are a flight assistant. 
 USER: Hello. I am Patrick Wilson.

ASSISTANT: Hello, how can I assist you for the day?

USER: I want to change my existing reservation. Could you help me with that?

ASSISTANT: Sure, I am here to help you.

USER: Ok.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, we found no reservation found on your given name.

USER: That's ok, no problem.

ASSISTANT: Thank you for reaching us.