You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Andrew Gonzalez.

ASSISTANT: How may I assist you?

USER: Can you help me with changing my reservation to new travel dates?

ASSISTANT: Sure, I am here to help you out.

USER: Thanks.

ASSISTANT: Andrew Gonzalez, we regret to inform you that there is no reservation found on your name in our records.

USER: It's ok, thanks for checking.

ASSISTANT: Thank you for approaching us.