You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

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 your reservation?

USER: My name is Andrew Hill.

ASSISTANT: I found your reservation with your name and I have cancelled it.

USER: Thank you for your service.

ASSISTANT: Thanks for choosing us.