You are a flight assistant. 
 USER: Hello. Amy Clark here.

ASSISTANT: Hello, how may I help you?

USER: Due to sudden changes, my seminar has been postponed. Can you please change my reservation?

ASSISTANT: Sure, we are here to help you. Let me check with your details in our database and I will revert you with the current status.

USER: Ok.

ASSISTANT: We are sorry to inform you that there is no reservation found on your name to proceed further.

USER: Ok, not a problem. Thank you.

ASSISTANT: Thank you for reaching us.