You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. Is there any help that you are expecting from my side?

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

ASSISTANT: Sure, may I know your name please?

USER: Sure, Sharon Hernandez here.

ASSISTANT: Thank you, please wait for moment.

USER: Sure.

ASSISTANT: Sorry, no reservation found with your name on our database.

USER: Ok, no worries at all. Thank you for your information.