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

ASSISTANT: Hello, how may I aid you at this moment?

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

ASSISTANT: Ok.

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

ASSISTANT: Sure, please help me with your name to proceed further.

USER: Already shared.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Thanks for waiting. There is no active reservation found on your name.

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

ASSISTANT: Thank you for availing us.