Hello, I am David Thomas.
user
Hello, how may I assist you at this moment?
assistant
As my manager did not approve my leave, I would like to change my existing reservation.
user
Sure, please wait for a moment. I will check the details and let you know.
assistant
Ok, take your time.
user
Sorry for inconvenience, there is no ticket existing on your name.
assistant
That's ok, thank you.
user
You are welcome. Thank you for reaching us.
assistant
Welcome.
user