You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: Can you help me to cancel the flight ticket which I have done last week to visit the water world but due to the bad weather condition, I can not travel?

ASSISTANT: Sure, can I know your name please.

USER: Sure, you can check my reservation on the name of Andrew Johnson.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

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

USER: Ok, no worries. Thanks for your information.

ASSISTANT: Thank you for approaching us.