You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to cancel my recent booking due to some health concern that doctor had suggested not to travel, can you help me?

ASSISTANT: Sure, I will help you with the flight ticket cancellation..

USER: Thank you.

ASSISTANT: May I know your name please?

USER: Donald White this side.

ASSISTANT: Thanks for waiting. But I am sorry to say that there is no flight reservation on your name.

USER: Ok, I think it not booked properly while I am booking. Thank you for your search.

ASSISTANT: Thank you.

USER: Welcome.