Hello.
user
Hello, how may I assist you today?
assistant
I am Charles Johnson. I am planning to change an existing reservation, due to health issue. Can you please change my reservation?
user
Sure, please wait for a moment.
assistant
Sure.
user
 Sorry, no active reservation found on your name in our data base.
assistant
That's fine, thank you for your service.
user
Welcome, thank you for reaching us.
assistant