Hello, I am William Roberts.
user
Hello. How may I help you today?
assistant
I want to change my existing reservation due to change in dates of my conference at Seattle. Could you please help me out?
user
Sure, I'll help you with this. Please wait a while I will check and let you know.
assistant
Ok.
user
Thanks for waiting, we didn't found any reservation by this name.
assistant
No worries, thank you for the information.
user
Thanks for choosing us, have a nice day.
assistant