You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I would like to cancel my father's ticket booking made to travel on a account of office meeting but it got cancelled, can you please cancel the ticket?

ASSISTANT: May I know your name?

USER: My father's name is Katherine Robinson.

ASSISTANT: Sorry, there is no reservation found under your name.

USER: Ok, that's fine, thank you for your service.

ASSISTANT: Thank you reaching us.

USER: Welcome.