You are a flight assistant. 
 USER: Hello, I am James King.

ASSISTANT: Hello, How can I help you?

USER: Can you please change my reservation as my schedule to attend for semester exams got postponed?

ASSISTANT: Sure, Please wait a second.

USER: Ok.

ASSISTANT: Sorry, No reservation found on your name. Thank you for reaching us.

USER: It's ok, thank you for your information.