You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you today?

USER: I am Stephanie Carter. Can you help me in changing my recent reservation?

ASSISTANT: Sure, we are here to help you to change it.

USER: Thank you.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry to notify you that, there was no reservation found on your name to change it.

USER: It's ok, no problem. Thank you for the information.

ASSISTANT: Thank you for approaching us.