Hello. Mark Thomas here.
user
Hello, how may I help you?
assistant
I need to change my existing reservation as my plan to go for an historical tour got postponed. Can you please check if my reservation is active or not? If it is active, please change it.
user
Sure, please wait for a while.
assistant
Ok.
user
Sorry, no reservation found on your given name.
assistant
Ok, not an issue.
user
Thank you for choosing us.
assistant
Thanks for the help.
user