You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER:  I want to postpone my existing reservation due to an emergency. Can you aid me?

ASSISTANT: Sure, please provide me the name.

USER: I am Raymond Lewis.

ASSISTANT: Please be on hold.

USER: Take your time.

ASSISTANT: Thank you for waiting.

USER:  No issues. Thank you for checking.

ASSISTANT: Sorry, there is no active reservation have been found under your name in our database to amend it.

USER: That's ok, no problem. Thank you for the service.

ASSISTANT: Thank you for reaching us.