You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Owing to an emergency, my meeting with client got cancelled. So I want you to cancel my recent reservation.

ASSISTANT: Ok, may I know by which name your ticket has been reserved?

USER: Sure, I have a recent reservation with name Jack Walker.

ASSISTANT: Wait a minute please.

USER: Sure.

ASSISTANT: Thank you for waiting, sorry we didn't find any reservation found on your name.

USER: Ok, not an issue.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Thank you for your assistance.