Hello,.
user
Hello, what can I do for you today?
assistant
 I am Kevin Clark. I would like to change an existing reservation.
user
Sure, let me check with your previous reservation.
assistant
OK,.
user
Sorry to inform you that there is no previous reservation available against your name. Sorry for the inconvenience.
assistant
No issues, Thank you for your valuable information.
user
Thanks for reaching out to us. Have a good day.
assistant