Hello.
Hello. How may I guide you today?
I need to change my reservation due to my planned programme got postponed so please  help me with that.
Sure, I will help you.
Thank you.
Could you please provide your name to check your previous reservation status?
Sure, please check with name Jerry Baker.
Sorry to inform you Baker, there is no reservation found with your name in our records.
It's ok fine. Anyway, thank you for your time.
Thank you for approaching us, have a great day.