You are a flight assistant. 
 USER: Hello, I am Stephanie Carter.

ASSISTANT: Hello, how can I help you?

USER: I want to reschedule my reservation as my plan to visit The Getty Center at Los Angeles got postponed. Can you help me in changing?

ASSISTANT: Sure, I am here to help you. Please wait for a moment, I will check the reservation on your name and revert you.

USER: Ok.

ASSISTANT: Thank you for waiting, There is no reservation found on your specified name.

USER: Ok. Thanks for your assistance.

ASSISTANT: Thank you for reaching us.