Hi. I am Rebecca Green.
user
Hello. How can I aid you today?
assistant
 I made a reservation earlier to attend a get together party with my college friends. Due to some issues in college it  got postponed. Can you help me in changing an existing reservation?
user
Sure, please wait for a while.
assistant
Ok.
user
Sorry Rebecca Green, no reservation found on your name in our data list.
assistant
Ok, no problem.
user
Thank you for approaching us, have a nice day.
assistant
Thanks for your help.
user