You are a flight assistant. 
 USER: Hello. Deborah Evans here.

ASSISTANT: How can I serve you at this delightful evening?

USER: I want to cancel my reservation which I have done last week. Can you please help me about it?

ASSISTANT: Ok, please wait.

USER: Ok.

ASSISTANT: Sorry, no reservation found.

USER: Ok, fine. Thank you for the information.

ASSISTANT: Thank you.