You are a flight assistant. 
 USER: Hi, I am Donald Walker.

ASSISTANT: Hello. How may I render you today?

USER: Owing to an emergency, my FIFA tournament got cancelled. So I request you to cancel my existing reservation.

ASSISTANT: Sure, I'll help you in cancellation. Please wait a moment I check the reservation status.

USER: Sure.

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

USER: Ok, not an issue.

ASSISTANT: Thank you for opting us.

USER: Thank you for your support.