Hi.
user
Hello. How may I help you?
assistant
I want to change my existing reservation due to some problems, can you please help me?
user
Sure, I am here to help you with that. Can I know your name?
assistant
Thank you for considering my request. Sure, my name is Robert Martinez.
user
Please wait for a minute.
assistant
Sure, I will wait.
user
Sorry to say that, there is no reservation found on your name in our database.
assistant
Ok, no problem. Anyways, thank you for your service.
user
Thank you for approaching us.
assistant