Hello.
user
Hello, how can I help you today?
assistant
I want to change my existing reservation due to postpone of my exams, can you help me with that?
user
Sure, please share your name.
assistant
My name is Charles Wilson.
user
Please wait a second.
assistant
Sure.
user
Sorry, there is no reservation found under your name.
assistant
No problem, thank you for the checking.
user
Thank you for choosing us.
assistant