You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I abet you today?

USER: I am Gary Clark. I want o cancel my reservation due to sudden change in my trip. Can you cancel it?

ASSISTANT: Sure, please wait.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no reservation found on your name.

USER: Ok, thank you.

ASSISTANT: Thank you.