You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello.

USER: I am Karen Garcia.

ASSISTANT: How may I aid you?

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

ASSISTANT: Sure, I am glad to help you.

USER: Thank you.

ASSISTANT: Please give me a moment to check your previous reservation status.

USER: Sure.

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

USER: Ok, no issue. Thank you.

ASSISTANT: Thank you for reaching us.