Hello.
user
Hello, may I know your name please?
assistant
Myself Donna Anderson.
user
Yes, how can I help you?
assistant
I want to do some changes in the existing reservation because my friends are not able to come on the those dates, can you please help me?
user
Sure, please wait for a while. Sorry, there is no reservation.
assistant
That's ok, thank you.
user
Thank you and have a nice day.
assistant