You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I assist you?

USER: Can you please cancel my reservation as the conference which I want to attend got delayed?

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

USER: Carol Smith is my name.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: That's not a problem.

ASSISTANT: Thank you for choosing us.

USER: Thanks for your time.