Hello.
user
Hello. How may I help you out?
assistant
I would like to change my existing reservation, can you please help me out?
user
Sure, I will help you in changing the reservation. May I know your name please?
assistant
Sure, my name is David Smith.
user
Sorry, there are no reservations found.
assistant
Ok, no issues. Thank you for your information.
user
Thank you.
assistant