You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Joseph Scott. I would like to cancel my ticket due to health issue's and doctor suggested not to travel in fights. Can you please cancel my ticket booking?

ASSISTANT: Sure Scott, please wait a moment.

USER: Sure.

ASSISTANT: Sorry Scott, there is no reservation found on your name.

USER: Ok, I think my brother might cancelled that one, thank you for your search and providing the information.

ASSISTANT: Thank you for approaching us.

USER: Thank you.