Hello.
user
Hello.
assistant
My name is Charles Parker.
user
How may I assist you now?
assistant
I want to do some changes in my existing reservation. Can you help me for that?
user
Sure, I will help you.
assistant
Thank you.
user
Please allow me to check with your existing reservation.
assistant
Sure, I will wait for your response.
user
Sorry to say, there is no active reservation by your name.
assistant
That's ok, thank you for checking.
user
Have a nice day.
assistant