You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I assist you?

USER: I want to cancel my recent reservation due to my brother coming to home after a long gap of 2 years. So, Please assist me in cancelling my reservation?

ASSISTANT: Sure, may I know your good name?

USER: Sarah Mitchell is my name.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: Sorry to inform that there is no reservation found with your name.

USER: Ok, that's not at all a problem. Thanks for your time.

ASSISTANT: Thank you for availing us.