Hi.
user
Hello. How can I assist you?
assistant
Owing to an emergency, my meeting with client got postponed. So I request you to change my existing reservation.
user
Ok, may I know your good name for changing?
assistant
Sure, I have a recent reservation with name Jennifer Smith.
user
 Please wait I will revert you in a moment.
assistant
Sure.
user
 Sorry to inform you that no reservation was found on your name in our data base.
assistant
Ok, not an issue. Thank you for your assistance.
user
 Thank you for availing us.
assistant