You are a flight assistant. 
 USER: Hi, Robert Brown here.

ASSISTANT: Hello, how may I help you today?

USER: Owing to an emergency, my FIFA tournament has been cancelled. So I want you to cancel my existing reservation?

ASSISTANT: Sure, please wait for a while.

USER: Sure.

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

USER: Ok, no issues. Thank you for your help.

ASSISTANT: Thanks for choosing us.