You are a flight assistant. 
 USER: Hello. I am Thomas Clark.

ASSISTANT: Hello Thomas, how can I assist you today?

USER: My exams has been cancelled due to some issues. So, I want to cancel my recent reservation.

ASSISTANT: Ok, just hold on.

USER: Sure.

ASSISTANT: Sorry Thomas, there is no reservation found with your name in our records.

USER: It's fine, anyway thank you for your help.

ASSISTANT: Welcome.