Hello.
user
Hello, how can I  aid you today?
assistant
I want to change my reservation due to some personal work, can you please help me with it?
user
Sure, I am ready to help you. May I know your name please?
assistant
I am George White.
user
OK, please hold on I will check and get back to you.
assistant
Sure.
user
Thanks for waiting. Sorry say to you there is no reservation found with your specification.
assistant
Its ok, thank you.
user
Thank you for choosing us, have a great day.
assistant