Hi.
user
Hello, how may I serve you today?
assistant
I need to change my existing reservation, Can you please help me with that?
user
Sure, may I know your name?
assistant
I am David Harris.
user
Please wait, I will check the reservation and get back to you.
assistant
Sure.
user
Sorry, there is no reservation found on your name.
assistant
Ok, no problem. Thanks for your information.
user
Thank you for reaching us.
assistant