Hello.
user
Hello. How may I help you?
assistant
I am Jessica Baker. Can you please help me in changing my reservation as the food festival which I have planned to attend got postponed?
user
Ok, please wait I will revert you in  a moment.
assistant
Sure.
user
 Thanks for waiting. Sorry to inform you that no reservation was found on your name.
assistant
It's ok, thank you for your response.
user
 Thank you for your availing us.
assistant