Hi.
Hello, how may I help you today?
I am Stephen Phillips. Can you help me for changing my existing reservation?
Sure, I am here to help you. Please wait for a mean while.
Thank you. Sure.
Sorry Stephen, there is no reservation found as per your name to change your reservation.
Oh! It's ok I think my sister already changed my reservation. Anyway thank you for your services.
You are welcome and have a great day.