Hi.
user
Hello. How can I serve you?
assistant
My name is Christopher perez. I want to change my existing reservation due to my convocation has been postponed. Can you help me with change reservation?
user
Sure, we are here to help you out. Please wait  a while.
assistant
Sure.
user
Thanks for your time. We didn't found any reservation by this name.
assistant
Ok, No problem.
user
Thank you for choosing us.
assistant
Thanks for the information.
user