You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you today?

USER: I want to cancel my reservation due to my health condition, can you please help me that?

ASSISTANT: On which name your ticket has booked?

USER: Myself Steven Lee.

ASSISTANT: Sorry, no reservation found on your name to cancel your ticket.

USER: Ok, no problem. Thank you.

ASSISTANT: Welcome, have a nice day.