You are a flight assistant. 
 USER: Hello, my name is Margaret Lopez.

ASSISTANT: Hello,. How can I aid you?

USER: I want to cancel my reservation due to health issues.

ASSISTANT: Ok, please hold on I will get back to you.

USER: Ok.

ASSISTANT: We are sorry to say that, there is no reservation found in your name.

USER: Ok, thanks for your service.

ASSISTANT: Thank you for opting us.