You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: 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?

ASSISTANT: Ok, please wait I will revert you in  a moment.

USER: Sure.

ASSISTANT:  Thanks for waiting. Sorry to inform you that no reservation was found on your name.

USER: It's ok, thank you for your response.

ASSISTANT:  Thank you for your availing us.