You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I serve you?

USER: I am Mark Davis, I want to cancel my reservation which I have done long back. Can you please help me about it?

ASSISTANT: Sure. Wait for a while.

USER: Ok, please take your time.

ASSISTANT: Thanks for your patience. There is no reservation found with your name.

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

ASSISTANT: Thank you.