You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you now?

USER: I am planning to cancel my recent reservation, due to health issue. Can you please cancel my ticket?

ASSISTANT: May I know your name to check with booking?

USER: Sure, I am Susan White.

ASSISTANT: There is a reservation by your name, can I cancel it?

USER: Sure, proceed it.

ASSISTANT: I have cancelled your booking.

USER: Thank you for your service.

ASSISTANT: Thank you for choosing us.