Hello.
user
Hello. How can I aid you today?
assistant
My name is William Jackson. Can you please help me to change my existing reservation?
user
Sure, we are here to help you with this reservation  change.
assistant
Sure.
user
Please wait for a moment, let me check your previous reservation status.
assistant
Sure.
user
Thank you for waiting. There is no active reservation found with your name in our database to change it.
assistant
No problem, thank you.
user
Thank you for reaching us.
assistant