Hello, Thomas Miller here.
user
Hello. How can I help you?
assistant
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?
user
Please give me a moment.
assistant
Sure, take your time.
user
Unfortunately, there is no reservation found under your name.
assistant
No problem, thank you for checking.
user
Welcome, have a great day.
assistant