Hi.
Hello, how may I render you today?
I am Mark Clark. I want to change an existing reservation due to sudden change in my trip. Can you help me?
Sure, we are glad to help you.
Thank you.
Ok, please wait for a while. I will with the reservation list and revert to you.
OK.
Thank you for waiting. There is no reservation found on your name.
That's fine.
Thank you for reaching us. Have a good day.