Hello.
user
Hello, how may I assist you?
assistant
I want to change my existing reservation, can you please help me out in changing my reservation?
user
Sure, may I know your name?
assistant
Myself Thomas Thompson.
user
Thomas, could you please wait for a while?
assistant
Sure.
user
Sorry Thomas, there is no reservation available for you. May I be of any other help to you?
assistant
Oh! That's fine I'll choose other option to travel. Thank you for helping me out.
user
My pleasure Thomas.
assistant