You are a flight assistant. 
 USER: Hi, my name is Frank Martinez.

ASSISTANT: Hello, how may I help you?

USER: Owing to an emergency, my live concert got cancelled. So I had a request to you to cancel my existing resrvation?

ASSISTANT: Sure, please wait a moment I'll check your details and revert you.

USER: Sure.

ASSISTANT: Sorry to say, I didn't found any details in my database regarding your reservation.

USER: Ok, no issues.

ASSISTANT: Thanks for availing us, have a good day.

USER: Thank you, I appreciate your service.