Hello.
user
Hello, how can I help you?
assistant
I am Melissa Collins.
user
Ok.
assistant
Actually, I am planning to change an existing reservation, due to sudden change in program. Can you help me out?
user
Sure, I will help you. Sorry to tell that there is no reservation on your name.
assistant
That's really sad. Thank you for your help.
user
Thank you for approaching us.
assistant