You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: My name is Barbara Carter, I want to cancel my reservation as my plan to meet my friend is cancelled. Can you cancel my reservation?

ASSISTANT: Sure, I will help you. Sorry to say, there is no reservation on your name in our database.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for opting us.