Hello, I am Dennis Williams.
user
Hello, how may I support you today?
assistant
I want to change my existing reservation due to my appointment has postponed with my client. Can you please help me with that?
user
Sure, Let me check the existing reservation with your name.
assistant
Sure, I will wait for your response.
user
Thank you for waiting, We are sorry to inform you that there is no reservation found with your name.
assistant
Ok, not an issue. Thank you for your valuable service.
user
Thank you for choosing us, Have a nice day ahead.
assistant