You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: My name is Andrew Nelson. I want to cancel my reservation, due to some issue.

ASSISTANT: Sure, I will help you in cancelling the reservation.

USER: Thank you.

ASSISTANT: Wait a moment please.

USER: Ok.

ASSISTANT: Andrew Nelson, there is no active reservation found under your name in our database to cancel it.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you for contacting us.

USER: Welcome.