Hi.
user
Hello, how can I help you?
assistant
I am Justin Thompson here, I want to change my existing reservation due to some problem, can you please help me in this intent?
user
Sure, we are here to help you. Wait for some time.
assistant
Ok, I will wait.
user
Thanks for waiting there is no reservations found on your name.
assistant
Ok, no problem. Thank you for your service.
user
Thanks for  choosing us.
assistant