You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I serve you?

USER: Can you please change my reservation as the arts festival which I want to attend got postponed?

ASSISTANT: Sure, I will help you. May I have your name please?

USER: I am Michelle Evans.

ASSISTANT: Ok. Your reservation is not found in our database.

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

ASSISTANT: Thanks for availing us, Have a nice day.