Hello, I am Helen Lee.
user
Hello, how can I aid you?
assistant
I would like to change an existing reservation due to my plan to meet my girlfriend got post pone. Can you help me with this?
user
Ok, please wait I will revert you.
assistant
Sure.
user
 Sorry to inform you that no reservation was found on your name.
assistant
Ok, not an issue. Thank you for your information.
user
Thank you for availing us.
assistant