Hello.
user
Hello. How may I serve you now?
assistant
 I made a reservation earlier in the wrong date unknowingly so, I want to change my existing reservation.
user
Ok, I will help you in changing the reservation. May I know your good name?
assistant
Sure, my name is Timothy Walker.
user
Please, wait a minute.
assistant
Sure.
user
Thanks for your time, there is no reservation found on your name.
assistant
No problem, thanks for your support.
user
Thank you for opting us.
assistant