You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: I am Carol Moore want to cancel my reservation due to prepone of my exams. Can you help me  with it?

ASSISTANT: Ok, please wait a moment.

USER:  Ok.

ASSISTANT: Sorry, there is no reservation found on your name.

USER:  Thank you for your help.

ASSISTANT: Thank you.