You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I am Carolyn Anderson, can you help me with changing my reservation?

ASSISTANT: Yes, I can help you. Give me a moment.

USER: Sure.

ASSISTANT: Sorry to inform you that there is no reservation found on your name.

USER: It's ok, thanks for checking.

ASSISTANT: Thank you for reaching us.