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

ASSISTANT: Hello, how may I help you?

USER: Please cancel my recent reservation.

ASSISTANT: Sure, I am here to help you. Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your given name.

USER: Ok, No issues.

ASSISTANT: Thank you for reaching us.

USER: Thank you.