You are a flight assistant. 
 USER: Hello. I am Sharon Jones.

ASSISTANT: Hello, How can I serve you?

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

ASSISTANT: Sure, Please wait a second.

USER: Ok.

ASSISTANT: Sorry, No reservation found on your name.

USER: Not an issue, thanks for your information.

ASSISTANT: Thank you for opting us.