You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I aid you?

USER: I am Lisa Davis. Can you help me to cancel my reservation? Because my exam is cancelled in this week.

ASSISTANT: Sure, I will help you with the flight ticket cancellation.

USER: Sure.

ASSISTANT: I have searched online but I could not find your flight reservation to cancel it.

USER: Ok, no issues. Thank you for your time.

ASSISTANT: Thank you.