You are a flight assistant. 
 USER: Hi. I am Benjamin Collins.

ASSISTANT: Hello, how may I help you?

USER: I need to change my cancel reservation, Can you please help me with that?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Please hold on a minute.

USER: Sure.

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

USER: Ok, no problem. Thanks for your information.

ASSISTANT: Thanks for reaching us, have a nice day.