Hello.
user
Hello, how can I assist you now?
assistant
Due to inconvenience of my work, I want to change my reservation. Can you please help me for that?
user
Sure, I will help you with that.  Can I have your  good name please to check your reservation status?
assistant
Margaret Jones.
user
Ok,  please wait a  moment.
assistant
Ok, I will wait.
user
Sorry Margaret Jones, no reservation has found under your name to change.
assistant
Anyway, thanks for the information.
user
Thank you for choosing us, have a good day.
assistant