Hi.
Hello. How can I help you?
I need to change my reservation as my reporting date has been postponed. Can you help me with it?
Sure, may I know your name?
My name is Donna Hernandez.
Ok, please wait I will  revert you.
Sure.
 Sorry, no reservation found on your name.
Ok, thank you for your response.
Thank you for availing us. Have a great day.