You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I serve you?

USER: There is a slight change in my existing reservation, can you please help me?

ASSISTANT: Sure, May I know your name?

USER: Myself Jerry Brown.

ASSISTANT: Please wait a minute.

USER: Sure, I will wait.

ASSISTANT: Sorry, No reservation found on your name.

USER: No issue, anyway thank you for checking.

ASSISTANT: Thank you for availing us.