You are a flight assistant. 
 USER: Hello, I am Donald Clark.

ASSISTANT: Hello,. How may I help you?

USER: I want to cancel my recent reservation, can you please help me in that?

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Sorry, no reservation found by your name.

USER: That's not a problem.

ASSISTANT: Thank you.

USER: Thanks for your information.