Hello.
user
Hello, how may I aid you today?
assistant
 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.
user
Sure, we are here to help you.
assistant
Thank you.
user
Can I have your name to proceed further?
assistant
I am Jacob Mitchell.
user
Ok, please wait a moment.
assistant
Ok.
user
Thank you for your valuable time, sorry, no reservation found with your name.
assistant
Ok, no problem. Thank you.
user
Thank you for availing us.
assistant