Hello, Mark Smith here.
Hello. 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?
Please give me a moment.
Ok, take your own time.
Unfortunately, there is no reservation found under your name.
Ok, not a problem at all. By the way, thank you for the information.
Welcome, have a great day.