Hello.
user
Hello, how may I assist you today?
assistant
I have made a reservation wrongly, so please help me in changing.
user
Sure, may I know your name for the change process?
assistant
Sure, my name is Mary Garcia.
user
Sorry as per your concern I can not amend your reservation as your reservation is not found as per our records.
assistant
That's Ok, thank you for your information.
user
Welcome, thank you for reaching us.
assistant