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