Hello.
user
Hello. How can I help you?
assistant
I want to change my existing reservation, can you please help me in that?
user
Sure, I can help you with that and can I know your name for checking purpose?
assistant
My name is Robert Garcia.
user
Thank you for your information, please give me a moment to check your previous booking.
assistant
Sure.
user
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.
assistant
Ok, that's not a problem. Thanks for your information.
user
You are most welcome and have a nice day.
assistant