You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you out?

USER: I need to cancel my ticket due to my health issue, can you help me?

ASSISTANT: Sure, I will help you in cancelling the ticket. May I know your name please?

USER: I am Nicholas King.

ASSISTANT: Sorry, there are no reservations found.

USER: That's ok. Thank you.

ASSISTANT: Thank you for reaching us.