You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you today?

USER: I want to change my existing reservation due to some technical issues. Can you help me with that?

ASSISTANT: Sure, please hold on a moment.

USER: I am James Jackson.

ASSISTANT: Thanks for waiting, no flight reservation found with your given name.

USER: No problem.

ASSISTANT: Thank you for opting us.

USER: Thank you for your information.