Hello, I am Carol Green.
user
Hello. How can I assist you Carol Green?
assistant
I would like to change my plans to Denver so, I want to change my existing reservation. Can you please help me for changing my reservation?
user
Sure, I'll try my best to serve you. Wait a moment please, let me check the database to search your reservation status.
assistant
Sure.
user
I have searched with your name and couldn't find any active reservation.
assistant
Ok, Thank you for your service.
user
Thank you for contacting us.
assistant