Hello.
Hello. How can I help you?
I want to change my existing reservation, can you please help me in that?
Sure, I can help you with that and can I know your name for checking purpose?
My name is Robert Garcia.
Thank you for your information, please give me a moment to check your previous booking.
Sure.
Thank you for your patience, I regret to inform you that there is no reservation found for the user name in our back end to change your ticket booking.
Ok, that's not a problem. Thanks for your information.
You are most welcome and have a nice day.