You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: My interview got postponed, Can you please change my existing reservation?

ASSISTANT: Sure, please provide me the name.

USER: I am Daniel Nelson.

ASSISTANT: Please be on hold, I will get back to you in a minute.

USER: Ok.

ASSISTANT: Thank you for waiting. Here, there is no active reservation have been found under your name in our database to amend it.

USER: Ok, Thank you.

ASSISTANT: Thank you for reaching us.