Hello.
Hello, how may I help you today?
Due to some urgent conference meeting, I am planning to change my existing reservation. Can you please help me for this?
 Sure, may I know your name to check previous reservation.
Myself Charles Hernandez.
Please hold a moment.
Sure.
Sorry, there are no active reservations on your name to change.
Not a big deal, anyhow thank you very much for checking the reservation status.
Thank you for reaching our service.