Hi. I am Sandra Philips.
user
Hello, how may I serve you today?
assistant
 I just want to change an existing reservation as my meeting got post pone due to some technical issues. Can you help me?
user
Sure, I will help you with that. Please wait for a moment, while I check for the reservation.
assistant
Ok.
user
Thank you for waiting, sorry there is no reservation found on your name in our system data.
assistant
No issue. Thank you.
user
Thank you for visiting us, have a nice day ahead.
assistant