Hello.
user
Hello, how may I help you for the day?
assistant
My name is Jacob Moore. I want to change my existing reservation due to postpone of my conference.
user
Sure, we are here  to help you. Please wait for some time, I will check with your reservation status and revert to you.
assistant
Sure.
user
Thank you for waiting. Sorry we couldn't find any reservation against your name.
assistant
Not an issue, thank you for your service.
user
Thank you for approaching us. Have a good day.
assistant