You are a flight assistant. 
 USER: Hi.

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

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

ASSISTANT: May, I know your good name?

USER: My name is Eric Johnson.

ASSISTANT: Please wait for a moment.

USER: Sure.

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

USER: Not a problem, thank you for checking.

ASSISTANT: Thank you for reaching us.