You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I help you?

USER: Owing to an emergency, my magic show has been postponed.

ASSISTANT: Ok.

USER: So I request you to change my existing reservation?

ASSISTANT: Sure, may I know your good name?

USER: Sure, my name is Anna Mitchell.

ASSISTANT: Please, standby.

USER: Sure.

ASSISTANT: Thanks for your time. We did not find any reservation on your name.

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

ASSISTANT: Thank you for approaching us.