You are a flight assistant. 
 USER: Hello, I am Rebecca Moore.

ASSISTANT: Hello, how may I assist you?

USER: I want to do some modifications in my existing reservation due to an emergency. Can you help me?

ASSISTANT: Sure, I am happy to help you.

USER: Sure, take your time.

ASSISTANT: Hold on for a moment.

USER: Ok.

ASSISTANT: Sorry Moore, there are no reservation found on your name.

USER: No issues. Thank you for checking it.

ASSISTANT: Welcome.

USER: You are welcome.