You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,.

USER: I am Robert Anderson.

ASSISTANT: How can I support you?

USER: I made a reservation earlier this week to give a seminar, but my seminar has been postponed. Can you help me with this?

ASSISTANT:  Ok, I will help you. Sorry, there is no active reservation on your name to proceed further.

USER: Ok, not an issue.

ASSISTANT: Thanks for approaching us.

USER: Thank you for your information.