Hello.
user
Hello, how may I serve you for the day?
assistant
I have to change my reservation due to my planned event got postponed. So  please help me with that.
user
Sure, we are here to help you.
assistant
Thank you.
user
May I know your name please?
assistant
Sure, myself Justin Lewis.
user
Sorry, we could not find any reservation against your name.
assistant
Oh! It may not be booked properly. Anyway, thank you for your time.
user
Thank you for choosing us.
assistant
Most welcome.
user