Hello, I am David Perez.
user
Hello, how may I assist you?
assistant
As my manager did not approve my leave, I would like to change my existing reservation.
user
Sure, hold on for a moment. Let me check.
assistant
Ok, take your time.
user
Sorry David, there are no flights reserved on your given name.
assistant
That's ok, thank you for checking.
user
Welcome, thank you for choosing us. Have a great day.
assistant
Welcome.
user