Hi.
user
Hello.
assistant
Myself Carolyn King.
user
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
Sure, please wait a moment.
assistant
Ok.
user
Sorry King, no reservation has been found on your name.
assistant
It's ok. Thank you for checking.
user
Thank you for choosing us.
assistant
Welcome.
user