Hi.
user
Hello, what can I do for you today?
assistant
I want to change my existing reservation which is done recently due to some problems, can you please help me in this?
user
Sure, may I know your name please?
assistant
Sure, my name is Donald Hill.
user
Sorry, no reservation found on your given name in our database to change it.
assistant
Ok, no problem. Anyways, thank you for your service.
user
Thank you for contacting us.
assistant