You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you out?

USER: Myself Charles Miller, I want to cancel my reservation as my father met with an accident. Can you please help me?

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

USER: Thank you.

ASSISTANT: Sorry, there are no reservations found in our database.

USER: That's fine. Anyway, thank you for checking.

ASSISTANT: Thank you for reaching us.