Hello.
Hello, how may I aid you today?
 As I have planned a holiday trip with my friends but, suddenly I need to attend a client meeting at head quarters, so I need to change my reservation.
Sure, we are here to help you.
Thank you.
Can I have your name to proceed further?
I am Jacob Mitchell.
Ok, please wait a moment.
Ok.
Thank you for your valuable time, sorry, no reservation found with your name.
Ok, no problem. Thank you.
Thank you for availing us.