You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I am Katherine Hernandez. I want to cancel my recent reservation due to postpone of my seminar. Could you please help me?

ASSISTANT: Sure, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: No worries, thank you for the information.

ASSISTANT: Thank you for approaching us.