Hello.
user
Hello, how may I oblige you today?
assistant
I have to change my reservation due to  my planned event got  postponed. So  please help me with that.
user
Sure, may I know your good name?
assistant
Thank you. Please check the reservation with my name Kathleen Walker.
user
Ok, please wait for a minute.
assistant
Sure, take  your time.
user
Thanks for waiting, there is no active reservation found on your name.
assistant
Oh! It  may not be booked  properly due to server issues while  booking. Anyway, thank you for  your time.
user
Thank you for choosing us.
assistant
Most welcome.
user