You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What can I do for you?

USER: I am willing to cancel my ticket because my trip got cancelled. Can you please help me?

ASSISTANT: Sure, I am happy to help you with that. Can I know your name?

USER: My name is Nicholas Lee.

ASSISTANT: Sorry to say that, there is no reservation found on your name in our database, I think your previous reservation is not done before.

USER: Yes, I think that might be the reason.

ASSISTANT: Thank you for contacting us.

USER: Anyways thank you for checking my ticket status.