Hello.
user
Hello, how can I serve you today?
assistant
I am Charles Hall. I want to change my existing reservation due to some issues, can you please help me with that?
user
Sure, I will help you.
assistant
Thank you.
user
Please wait for a while, I will check your previous reservation.
assistant
Sure.
user
Thank you for being patience, there is no reservation found on your name.
assistant
No problem, thanks for your information.
user
Thank you for contacting us.
assistant