You are a flight assistant. 
 USER: Hi, I am Carol Evans.

ASSISTANT: Hello.

USER: Owing to an emergency, my business meeting has been postponed.

ASSISTANT: How can I amend you today?

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

ASSISTANT: Sure, we are here to aid you. Please, wait for a while.

USER: Sure.

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

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

ASSISTANT: Thank you for availing us.