Hello,.
user
Hello, How can I assist you?
assistant
I need to change my existing reservation, my family meeting got postponed. Can you help me in changing my reservation?
user
I can help you with that. May I know your good name?
assistant
Yes, I am Debra Clark.
user
Please hold on. I will revert you.
assistant
OK.
user
Thanks for being patient, there was no reservation  on your name.
assistant
OK, thanks for information.
user
Thank you for contacting us.
assistant