Hello.
Hello, how may I render you today?
 I made a reservation earlier in the wrong date unknowingly so, I want to change my existing reservation. Can you help me to change it?
Sure, I will help you with that.
Ok.
May I know your good name please?
Sure, my name is Dennis Turner.
Ok, please wait for a couple of minutes.
Sure.
Thanks for waiting, no active reservation was found on your name in the database.
Ok, thank you.
Thank you for availing us.