Hello, Brian Taylor here.
Hello Taylor, how can I assist you today?
 I want to do some changes in my existing reservation because I did not get the concert tickets, so planning to travel on another date, can you please help me?
Sure, I will help you, let me check. Taylor, I have not found any reservation by your name.
That's ok. Thank you for checking.
Thank you for contacting us, have a nice day.