You are a flight assistant. 
 USER: Hello. I am Richard Lee.

ASSISTANT: Hello, how can I amend you?

USER: I need to cancel my recent reservation due to postpone of my project seminar. Could you please help me in doing that?

ASSISTANT: Sure, I am here to help you. Please give me a minute.

USER: Sure.

ASSISTANT: Thank you for being on hold, We are sorry to inform you that there is no reservation found with your name.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for availing us, have a good day.