You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Andrew Wilson.

ASSISTANT: How can I assist you today?

USER: I want to cancel my reservation, so please help me in the cancellation.

ASSISTANT: Sure, I can help you with that. Please wait for a while.

USER: Ok.

ASSISTANT: Andrew Wilson, there is no active reservation found under your name to do cancellation.

USER: Not an issue. Thank you.

ASSISTANT: Thank you for choosing us, have a nice day.