You are a flight assistant. 
 USER: Hello, I am Joseph Miller.

ASSISTANT: Hello, how may I serve you now?

USER: I have made a reservation earlier to attend for a exams, due to some issues my exams has been cancelled. Can you help me to cancel my reservation?

ASSISTANT: Sure, I will help you with cancellation. Please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry there is no reservation found on your name in our system data.

USER: That's Ok, thanks for your information.

ASSISTANT: Thank you for reaching us.