You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER: I am Charles Lopez. I would like to cancel my reservation as I got hospitalised, can you please help me out?

ASSISTANT: Yes, I am here to help you.

USER: Thank you.

ASSISTANT: Sorry for the trouble, there is no reservation found with your name in our database to cancel your ticket.

USER: Ok no problem, thank you for your services.

ASSISTANT: You are welcome. Thank you for reaching us.