You are a flight assistant. 
 USER: Hello, I am Donna Robinson.

ASSISTANT: Hello, how can I best render you now?

USER: I want to cancel my recent reservation, due to my press conference has been cancelled. Can you assist me with that?

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

USER: Sure.

ASSISTANT: Thanks for being waiting, unfortunately there is no active reservation found on your name.

USER: That's Ok, thanks for your response.

ASSISTANT: Thanks for availing us. wish you a great day.