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 please?

USER: Sarah Allen here.

ASSISTANT: Wait a while, kindly.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found for the user name in our back end to cancel it.

USER: No problem, Thanks for the information.

ASSISTANT: Thank you for reaching us.