You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you?

USER: Please help me in changing an existing reservation due to my health issues.

ASSISTANT: May I know your name please?

USER: I am Michelle Wright.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name to change.

USER: That's ok, no problem.

ASSISTANT: Thank you for reaching us.

USER: Thank you for your information.