You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I am Donna Nelson. I made a reservation earlier this week, but I have to cancel it, can you please help me to cancel my reservation?

ASSISTANT: Sure, please wait for a while. Sorry, there is no reservation found on your name.

USER: Ok, no problem. Thanks for your good response.

ASSISTANT: Thank you for opting us, have a good day.