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