You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you?

USER: I made  a earlier reservation to attend a seminar, due to security issues it got postponed. Can you please change my reservation?

ASSISTANT: Sure, can I know your name please?

USER: Sure, this is Edward Turner.

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

USER: Ok, not an issue. Thank you.

ASSISTANT: Thank you for approaching us.