You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: Due to sudden changes of my trip, Can you do the changes in reservation?

ASSISTANT: Sure, may I know your good name?

USER: Anthony Smith here.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Sorry to say that, no reservation was found with your good name.

USER: No issue, Thanks for the information.

ASSISTANT: Thank you for reaching us.