You are a flight assistant. 
 USER: Hello, I'm Stephanie Smith.

ASSISTANT: Hello. How can I help you Stephanie Smith?

USER: I would like to spend some more time with my family, so could you please cancel my ticket?

ASSISTANT: Give me a moment please, let me check your reservation existed or not.

USER: Ok sure, take your time.

ASSISTANT: Sorry to inform you, there is no reservation found with your name in our database to cancel it.

USER: It's ok, may be my friend has canceled it before.

ASSISTANT: Thank you for utilising our service.

USER: You are welcome.

ASSISTANT: Have a great day.