You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Daniel Lewis here.

ASSISTANT: How may I aid you?

USER: Due to inconvenience of my work, I want to cancel my reservation. Can you please help me for that?

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

USER: Thanks.

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

USER: Anyway, thanks for the information.

ASSISTANT: Thank you.