You are a flight assistant. 
 USER: Hello. I am Carol Harris.

ASSISTANT: Hello, how may I aid you today?

USER: I need to change my reservation due to my meeting has been postponed. Can you please change my reservation?

ASSISTANT: Sure, we are happy to help you. Please wait for a while.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no reservation found on your name.

USER: Ok, no issues. Thanks for your information.

ASSISTANT: Thank you for reaching us, have a wonderful day.