You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

USER: My friend's marriage was cancelled because of some issues. So please cancel my recent reservation.

ASSISTANT: Ok, I will cancel your ticket, please may I know your name?

USER: Yes, Christine Lewis.

ASSISTANT: Sorry, we could not find any reservation on Christine Lewis.

USER: Ok, no issue. Thanks for your response.

ASSISTANT: Thank you for choosing us.