Hello,.
user
Hello. How can I serve you today?
assistant
 I am Nichole Garcia. Due to wrong source code is mentioned in my previous reservation. So, I want to change my existing reservation. Can you help me out in changing my reservation?
user
Sure, I will help you. Wait a minute.
assistant
Sure.
user
Thanks for waiting. I regret to inform you that there is no reservation found with your name.
assistant
Ok, not a problem. Thanks for your quick service.
user
Ok, Thanks for contacting us.
assistant