You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

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 to check for the previous reservation?

USER: My name is Sarah Williams.

ASSISTANT: Please allow me a moment.

USER: Sure, take your time.

ASSISTANT: Sarah, there is no reservation found under your name.

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

ASSISTANT: Thank you for contacting us, have a great day.