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

ASSISTANT: Hello, How can I respond to your request?

USER: I want to change my reservation, can you help me with that?

ASSISTANT: Sure, I can help you in that.

USER: Thank you.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to notify that, there is no active reservation found on your name.

USER: Ok, no issues. Thank you for sharing the information.

ASSISTANT: Thanks for consulting us, have a great day.