You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you out?

USER: I am looking to cancel the ticket because I am unable to travel due to some health issues. Can you please help me to do that?

ASSISTANT: Sure, I will help you in cancelling the ticket.

USER: Thank you for accepting my request.

ASSISTANT: May I know your name please?

USER: My name is Stephen Gonzalez.

ASSISTANT: Sorry, there are no reservations found.

USER: It's ok, not a problem. Anyways thank you for your time.