You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am Angela Brown. I need to cancel my reservation due to some personal issues.So can you help me with cancellation of my reservation?

ASSISTANT: Sure, I am here to help you in cancelling your reservation. Please allow me a moment to check for your status.

USER: Sure.

ASSISTANT: Sorry, there is no active reservation have been found under your name in our database to cancel it.

USER: No problem, thanks for your information.

ASSISTANT: Thank you for reaching us.