Hi.
user
Hello. How may I help you out?
assistant
I need to change my existing reservation, can you please help me with that?
user
Sure, I will help you in changing the reservation. May I know your name please?
assistant
Emily Perez here.
user
Sorry, there are no reservations found in our database.
assistant
Ok, no problem. Thanks for your information.
user
Thank you for reaching us.
assistant