You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: Actually I planned for the trip, but unfortunately I am cancelled that, so please help me to cancel my recent reservation.

ASSISTANT: Sure, I will help you with that. We sorry to inform you that, we did not find any reservation with your name. May I know your good name please?

USER: My name is Nancy Carter. It's ok, thank you for the information.

ASSISTANT: Thank you for contacting us. Have a great day.

USER: You are welcome.