You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Emma Green.

ASSISTANT: How can I aid you?

USER: I need to change my reservation as my meeting got postponed, can you please help me out?

ASSISTANT: Sure, I am here to do that. Please, wait for a moment.

USER: Thank you. Ok.

ASSISTANT: Sorry to inform you, there is no reservation found on your name as per the records.

USER: Ok, no issues.

ASSISTANT: Thank you for reaching us.

USER: Thank you.