You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I guide you today?

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

ASSISTANT: Sure, I am glad to help you.

USER: Thank you.

ASSISTANT: Sorry, no reservation found on your name.

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

ASSISTANT: Welcome, have a nice day.