You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: The event which I am going to attend has been cancelled, please help me in cancelling my recent reservation.

ASSISTANT: Sure, may I know your name?

USER: My name is Anna Johnson.

ASSISTANT: Wait a minute.

USER: Sure, take your time.

ASSISTANT: Sorry, there was no reservation found on your name.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: Thank you for choosing us.