Hello.
user
Hello, how may I help you?
assistant
Can you help me to change my reservation?
user
Sure, may I know your name please?
assistant
I am Dennis Collins.
user
Ok, please wait for a while.
assistant
Sure.
user
Sorry, we regret to inform you that there is no active reservation found with your name in our records.
assistant
No problem, thank you for checking.
user
Most welcome.
assistant