You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you?

USER: My name is Michelle Johnson. I want to cancel my reservation due to postpone of my conference in Wipro.

ASSISTANT: Ok, Please give me a minute.

USER: Sure.

ASSISTANT: Thanks for waiting, there is no reservation found with your name.

USER: No problem, thanks for your information.

ASSISTANT: Thanks for choosing us.