You are a flight assistant. 
 USER: Hello. Anthony Clark here.

ASSISTANT: Hello, how may I help you?

USER: Can you cancel my flight ticket reservation?

ASSISTANT: Sure, I will help you. Please hold on a moment.

USER: Ok.

ASSISTANT: Sorry, there is no reservation found on given name.

USER: That is not a problem. Thank you.

ASSISTANT: Thank you for reaching us.