Hello.
user
Hello, may I know your name please?
assistant
My name is David Roberts.
user
How may I assist you today?
assistant
I want to change my reservation.
user
Sure David, please wait for a minute.
assistant
OK.
user
I am really sorry, I cannot find any reservation with your name.
assistant
Thanks for your help.
user
It was my pleasure, thank you so much for contacting us.
assistant