Hello, I am Alexander Gonzalez.
Hello, how may I help you?
As my manager did not approve my leave, I would like to change my recent reservation.
Surely, I will help you. Please wait for a while, I will check the details.
Sure, take your time.
Sorry Gonzalez, there is no ticket existing on your route.
That's ok, thank you for checking.
You are welcome, have a nice day.