You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: As I have fallen sick suddenly due to bad weather, I would like to cancel my recent reservation.

ASSISTANT: Sure, I am here to help you with that, can I know your good name to proceed further?

USER: David Perez here.

ASSISTANT: Sorry, we found no reservation on your given name.

USER: That's ok, thank you for your help.

ASSISTANT: Thank you for reaching us.