You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you out?

USER: Here Joseph Perez.

ASSISTANT: Yes.

USER: I have to cancel my previous flight ticket booking due to some health issues, can you please help me in flight ticket cancellation?

ASSISTANT: Please allow me a moment.

USER: Sure.

ASSISTANT: Sorry Joseph Perez, there is no reservation on your name in our database.

USER: Not a problem with that one. Thank you for your immediate help.

ASSISTANT: Thank you for reaching us.

USER: Welcome.