Hello. I am Charles Garcia.
user
Hello, how may I oblige you today?
assistant
I need to change my existing reservation due to postpone of seminar. Could you please help me in doing that?
user
Sure, I would be happy to help you.
assistant
Thank you.
user
Please wait for some time.
assistant
Sure.
user
Thanks for waiting. There is no reservation found with your name.
assistant
No problem, thank you for your valuable information.
user
Thank you for reaching us, have a nice day.
assistant