You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello. How can I help you?

USER: My wife is sick, so I have to change an existing reservation I made.

ASSISTANT: Sure, could you please provide your name to check the details of your reservation?

USER: My name is Nicole Parker.

ASSISTANT: OK, please wait a moment.

USER: OK.

ASSISTANT: Sorry for the inconvenience, no reservation found on your name.

USER: That's not a problem, thanks for your information.

ASSISTANT: Thank you. Have a nice day!.