You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I help you?

USER: I have planned for a trip with my friends at the end of the day my passport has been theft by some one, so I need to cancel my reservation. Can you help me with that?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: May I know your name please?

USER: I am Brandon Lee.

ASSISTANT: Ok, wait a minute please.

USER: Sure.

ASSISTANT: Thank you for waiting. Sorry to inform you that we didn't find any reservation on your name.

USER: Ok, no issues.

ASSISTANT: Thank you for reaching us, have a  nice day.

USER: Thank you.