You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: I am Edward Turner, I want to change my existing reservation due to health issue.

ASSISTANT: Yes, I can help you.

USER: Thank you.

ASSISTANT: There is no reservation found on the name which you have provided.

USER: It's ok, anyway thank you for the information.

ASSISTANT: You are most welcome.