You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I be of your help?

USER: Would you please help me to cancel my reservation on the name of Margaret Williams?

ASSISTANT: Sure, please wait a minute. I will check and get back to you.

USER: Ok.

ASSISTANT: Thank you for waiting. Unfortunately there is no reservation found against your name.

USER: Not an issue. Thanks for your time.

ASSISTANT: Thank you for reaching us.