You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Carol Hall.

ASSISTANT: How may I serve you?

USER: I want to change a flight reservation on my name. Please help me with it.

ASSISTANT: Sure, please wait a minute.

USER: Ok.

ASSISTANT: Thanks for your time, there was no reservation found with your name.

USER: No problem at all. Thanks for the information.

ASSISTANT: Thank you.