Hi. I am Melissa Brown.
user
Hello, how may I assist you for the day?
assistant
I need to change my existing reservation, Can you please help me with that?
user
Sure, we will help you. Please wait for a while.
assistant
Sure.
user
Sorry we did not find any reservation against your name.
assistant
Ok, no problem. Thanks for your information.
user
Thank you for reaching us.
assistant