You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I guide you?

USER: My father is unable to attend for the event, due to some health issues, so please help me to cancel my father's ticket.

ASSISTANT: Sure, can I know your name?

USER: My father's name is Betty King.

ASSISTANT: Please hold on for a moment, let me check.

USER: Ok, take your own time.

ASSISTANT: I am sorry to inform you that there are no reservations on your father's name. Thank you.

USER: It's ok, thank you for searching.