You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER:  I want to cancel my recent reservation which I have done last week because my trip got cancelled. Please help me out with that.

ASSISTANT: Ok, I am glad to help you with that.

USER: Thank you.

ASSISTANT: May I know your name for the ticket cancelling purpose?

USER: Myself Stephanie Carter.

ASSISTANT: Please give me a minute. We are regret to inform you that, there is no reservation found on your name in our database.

USER: It's ok, thank you.

ASSISTANT: Thank you for approaching us.