You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: I want to cancel my recent reservation, due to some health issue. Can you help me?

ASSISTANT: Sure, we are here to help you. May I know your name please?

USER: Thank you. Sure, I am Samuel Gonzalez.

ASSISTANT: I found your reservation on your name and it has been cancelled successfully.

USER: Thank you for your great service.

ASSISTANT: Thanks for contacting us.