You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you for today?

USER: I want to cancel my recent reservation for attending a friend's wedding, as I was invited at the last moment. Can you help me?

ASSISTANT: Yes, I will help you about it. Can you please provide your name for checking your existing reservation?

USER: My name is Jennifer Lee.

ASSISTANT: Lee there is a existing reservation under your name in our listing. Are you sure want to cancel?

USER: Ok, you can cancel it.

ASSISTANT: Yes, Lee your reservation is cancelled successfully.

USER: Ok, thank you for your quick response. Most welcome.