Hello,.
user
Hello, What can I do for you today?
assistant
I am Benjamin Lopez. 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 please change my existing reservation?
user
Sure, please wait a minute.
assistant
Ok.
user
Thank you for waiting, no reservation was found on the name Benjamin Lopez in our database.
assistant
Ok, no issue. Thank you.
user
Thank you for reaching us.
assistant