Hi.
user
Hello. How can I help you?
assistant
I am William Perez, as my manager did not approve my leave, I would like to change my reservation.
user
Sure, I will help to change your reservation.
assistant
Thank you.
user
Sorry, there is no reservation found on your name to change.
assistant
It's ok, thanks for checking.
user
Welcome. Thank you for choosing us.
assistant