Hi.
user
Hello, how may I serve you?
assistant
I am Alexander Harris. I need to change my existing reservation, Can you please help me with that?
user
Sure, I am here to help you. Please wait a moment I will check and get back to you.
assistant
Sure.
user
Sorry, there is no reservation found on your name.
assistant
Ok, no problem. Thanks for your information.
user
Thank you for opting us.
assistant