You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I assist you?

USER: I want to change my flight reservation as I am unwell, please do that for me.

ASSISTANT: Sure, May I know your name?

USER: My name is George Hernandez.

ASSISTANT: Please wait a minute.

USER: Sure.

ASSISTANT: Sorry, No reservation found on your name.

USER: Not an issue. Anyway, thank you for checking.

ASSISTANT: Thank you for availing us.