You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I want to cancel my reservation as I am unwell. Can you please help me out?

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

USER: Thank you.

ASSISTANT: May I know your name please?

USER: My name is Andrew Smith.

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

USER: No problem, anyway thank you for checking.

ASSISTANT: Thank you.