Hello.
user
Hello. How can I assist you today?
assistant
Myself Donald Walker. Due to some urgent business meeting, I am going to change my existing reservation. Can you please help me in changing the reservation?
user
Sure, please allow me a moment to check for the previous reservation.
assistant
Sure, I will wait for your response.
user
Donald, there is no reservation found under your name.
assistant
Not a big deal, anyhow thank you very much for your service.
user
Thank you for reaching us, have a great day.
assistant