You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I want cancel my recent reservation, due to some health issue. Can you help me?

ASSISTANT: Sure, I will help you in cancelling. May I know your name to check for the status?

USER: Thank you. I am Brian Collins.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: There is an active reservation have been found under your name in our database and I have cancelled it.

USER: Ok, thank you for your great help.

ASSISTANT: Thank you for reaching us.