You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Please cancel my recent reservation, due to some health issue.

ASSISTANT: Sure, We are here to help you. May I know your name?

USER: I am Donna Campbell.

ASSISTANT: Please wait a while.

USER: Sure.

ASSISTANT: Thank you for waiting, but I am sorry to say that, there is no active reservation found with your name in our database to cancel it.

USER: Ok, Thank you.

ASSISTANT: Thank your for reaching us.