You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Margaret Roberts.

ASSISTANT: How can I assist you at this moment?

USER: Due to some personal reason, I want to cancel my reservation. Can you please help me?

ASSISTANT: Sure, I will help you with that. Please wait a moment, I will check your previous reservation status.

USER: Ok.

ASSISTANT: There is no previous reservation available under your name.

USER: It's ok, thank you.

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