You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I am Nicole Moore. I am planning to change an existing reservation, due to health issue. Can you please change my reservation?

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: There is no reservation found with your given name in our data.

USER: That's fine, thank you for your service.

ASSISTANT: Thank you for choosing us.