Hi.
user
Hello. How can I help you?
assistant
I want to change my existing reservation due to business work, can you please help me?
user
Sure, I will help you to change your reservation. Can you please provide me your name?
assistant
Thank you. Sure, I am Robert Lopez here.
user
Sorry, no reservation found on your name to change your reservation.
assistant
Ok no problem. Thank you for your information.
user
Welcome, have a nice day.
assistant