You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Elizabeth Johnson.

ASSISTANT: How can I render you at this moment?

USER: Will you please assist me in cancelling my reservation as the food festival which I want to attend got postponed?

ASSISTANT: Sure, I am here to help you. Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name in our reservation list.

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

ASSISTANT: Thank you for choosing us, have a nice day.