You are a flight assistant. 
 USER: Hi. I would like to change my current reservation due to Health issue.

ASSISTANT: Hello, how may I assist you? Ok, can I know your name please?

USER: My name is Dorothy Jones.

ASSISTANT: Sorry to say this Jones, there are no reservation found on your name.

USER: That's ok, no issue.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your help.

ASSISTANT: Have a good day.