You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: As I have modified my plan, can you please help me to change my flight reservation?

ASSISTANT: Sure, May I know your name?

USER: I am Kathleen Harris.

ASSISTANT: Please wait a second.

USER: Sure.

ASSISTANT: Sorry, No reservation found on your name.

USER: Not an issue, thanks for the information.

ASSISTANT: Thank you for opting us.