You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How can I assist you now?

USER: I am Jacob Walker, I need to amend my reservation as my schedule got postpone. Can you please help me out?

ASSISTANT: Sure Jacob Walker, I will help you with that.

USER: Thank you for accepting my request.

ASSISTANT: Please wait a moment to check your reservation status.

USER: Ok, have your time.

ASSISTANT: Sorry Jacob Walker, no reservation has found under your name to change.

USER: Not an issue, anyway thank you for the information.

ASSISTANT: Thank you for choosing us, have a good day.