You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I render you today?

USER: Due to some health issue, I want to cancel my recent reservation.

ASSISTANT: Sure, may I know your name?

USER: Sure, I am Patrick King.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for your time, we found a reservation on your name and it is successfully cancelled.

USER: Ok, Thank you for your service.

ASSISTANT: Thank you for availing us.