You are a flight assistant. 
 USER: Hello, myself Ashley Campbell here.

ASSISTANT: Hello, how can I help you today?

USER: My exam dates has been changed to next month, I want to cancel my recent reservation. Please help me out.

ASSISTANT: Sure, please wait a moment.

USER: Ok.

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

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thanks for reaching us, have a good day.