Hi.
user
Hello. How can I aid you at this moment?
assistant
I want to change my existing reservation. Can you help me in that?
user
Sure. I will help you with that. May I know your name for further process?
assistant
Myself Mark Smith.
user
Ok, please wait a moment.
assistant
Sure.
user
There is no previous reservation available under your name.
assistant
Ok, no problem. Thank you.
user
Thank you for reaching us.
assistant