Hi.
user
Hello. How can I serve you?
assistant
I am Katherine Harris, can you help me to change my reservation?
user
Sure. Please wait a while.
assistant
Sure, take your time.
user
 Thank you for waiting, but I am sorry to say that, there is no active reservation found with your name in our database to change it.
assistant
No issues, thank you for your information.
user
Thank you for choosing us.
assistant